HMC7043LP7FETR - ANALOG DEVICES - Datasheet.Directory

High Performance, 3.2 GHz, 14-Output

Fanout Buffer

Data Sheet HMC7043

Rev. B Document Feedback

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FEATURES

JEDEC JESD204B support

Low additive jitter: <15 fs rms at 2457.6 MHz (12 kHz to 20 MHz)

Very low noise floor: −155.2 dBc/Hz at 983.04 MHz

Up to 14 LVDS, LVPECL, or CML type device clocks (DCLKs)

Maximum CLKOUTx/CLKOUTx and SCLKOUTx/SCLKOUTx

frequency of 3200 MHz

JESD204B-compatible system reference (SYSREF) pulses

25 ps analog and ½ clock input cycle digital delay

independently programmable on each of 14 clock

output channels

SPI-programmable adjustable noise floor vs. power consumption

SYSREF valid interrupt to simplify JESD204B synchronization

Supports deterministic synchronization of multiple

HMC7043 devices

RFSYNCIN pin or SPI-controlled SYNC trigger for output

synchronization of JESD204B

GPIO alarm/status indicator to determine system health

Clock input to support up to 6 GHz

48-lead, 7 mm × 7 mm LFCSP package

APPLICATIONS

JESD204B clock generation

Cellular infrastructure (multicarrier GSM, LTE, W-CDMA)

Data converter clocking

Phase array reference distribution

Microwave baseband cards

GENERAL DESCRIPTION

The HMC7043 is a high performance clock buffer for the

distribution of ultralow phase noise references for high speed data

converters with either parallel or serial (JESD204B type) interfaces.

The HMC7043 is designed to meet the requirements of multicarrier

GSM and LTE base station designs, and offers a wide range of

clock management and distribution features to simplify baseband

and radio card clock tree designs.

The HMC7043 provides 14 low noise and configurable outputs

to offer flexibility in interfacing with many different components in

a base transceiver station (BTS) system, such as data converters,

local oscillators, transmit/receive modules, field programmable

gate arrays (FPGAs), and digital front-end ASICs. The HMC7043

can generate up to seven DCLK and SYSREF clock pairs per the

JESD204B interface requirements.

The system designer can generate a lower number of DCLK and

SYSREF pairs, and configure the remaining output signal paths

for independent phase and frequency. Both the DCLK and SYSREF

clock outputs can be configured to support different signaling

standards, including CML, LVDS, LVPECL, and LVCMOS, and

different bias conditions to adjust for varying board insertion losses.

One of the unique features of the HMC7043 is the independent

flexible phase management of each of the 14 channels. All

14 channels feature both frequency and phase adjustment. The

outputs can also be programmed for 50 Ω or 100 Ω internal and

external termination options.

The HMC7043 device features an RF SYNC feature that synchro-

nizes multiple HMC7043 devices deterministically, that is, ensures

that all clock outputs start with the same edge. This operation is

achieved by rephrasing the nested HMC7043 or SYSREF control

unit/divider, deterministically, and then restarting the output

dividers with this new phase.

The HMC7043 is offered in a 48-lead, 7 mm × 7 mm LFCSP

package with an exposed pad connected to ground.

FUNCTIONAL BLOCK DIAGRAM

CLKIN/

CLKIN

RFSYNCIN/

RFSYNCIN

13114-001

SDATA SPI

CONTROL

INTERFACE

SLEN SCLK

14-CLOCK

DISTRIBUTION

SYSREF

CONTROL

CLKOUT0

SCLKOUT1

CLKOUT12

SCLKOUT13

Figure 1.

HMC7043* PRODUCT PAGE QUICK LINKS

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EVALUATION KITS

•HMC7043 Evaluation Kit

DOCUMENTATION

Data Sheet

•HMC7043: High Performance, 3.2 GHz, 14-Output Fanout

Buffer Data Sheet

User Guides

•UG-892: Evaluating the HMC7043 High Performance, 3.2

GHz, 14-Output Fanout Buffer

TOOLS AND SIMULATIONS

•HMC7043 IBIS Model

REFERENCE MATERIALS

Product Selection Guide

•RF, Microwave, and Millimeter Wave IC Selection Guide

2017

Technical Articles

•Synchronizing Sample Clocks of a Data Converter Array

DESIGN RESOURCES

•HMC7043 Material Declaration

•PCN-PDN Information

•Quality And Reliability

•Symbols and Footprints

DISCUSSIONS

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HMC7043 Data Sheet

Rev. B | Page 2 of 43

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagram .............................................................. 1

Revision History ............................................................................... 2

Specifications ..................................................................................... 3

Conditions ..................................................................................... 3

Supply Current .............................................................................. 3

Digital Input/Output (I/O) Electrical Specifications ............... 4

Clock Input Path Specifications.................................................. 4

Additive Jitter and Phase Noise Characteristics ....................... 5

Clock Output Distribution Specifications ................................. 5

Clock Output Driver Characteristics ......................................... 6

Absolute Maximum Ratings ............................................................ 8

ESD Caution .................................................................................. 8

Pin Configuration and Function Descriptions ............................. 9

Typical Performance Characteristics ........................................... 11

Typical Application Circuits .......................................................... 13

Terminology .................................................................................... 14

Theory of Operation ...................................................................... 15

Detailed Block Diagram ............................................................ 16

Clock Input Network ................................................................. 16

Clock Output Network .............................................................. 17

Typical Programming Sequence............................................... 23

Power Supply Considerations ................................................... 24

Serial Control Port ......................................................................... 27

Serial Port Interface (SPI) Control ........................................... 27

Control Registers ............................................................................ 28

Control Register Map ................................................................ 28

Control Register Map Bit Descriptions ................................... 33

Applications Information .............................................................. 41

Evaluation PCB And Schematic ............................................... 41

Outline Dimensions ....................................................................... 43

Ordering Guide .......................................................................... 43

REVISION HISTORY

7/2016—Rev. A to Rev. B

Changes to Table 1 ............................................................................ 3

5/2016—Rev. 0 to Rev. A

Changes to Table 3 ............................................................................. 4

Change to Maximum Operating Frequency Parameter, Table 7 ..... 7

Added Figure 6, Renumbered Sequentially ................................ 11

Change to Synchronization FSM/Pulse Generator

Timing Section ................................................................................. 21

Changes to Table 20 ........................................................................ 28

Change to Table 22 ......................................................................... 33

Changes to Table 28 ........................................................................ 34

Changes to Table 29 ........................................................................ 35

Change to Table 31 ......................................................................... 36

Change to Table 38 ......................................................................... 37

Changes to Table 41 ........................................................................ 39

12/2015—Revision 0: Initial Version

Data Sheet HMC7043

Rev. B | Page 3 of 43

SPECIFICATIONS

VCC = 3.3 V ± 5%, and TA = 25°C, unless otherwise noted. Minimum and maximum values are given over the full VCC and TA (−40°C to

+85°C) variation, as listed in Table 1.

CONDITIONS

Table 1.

Parameter1 Min Typ Max Unit Test Conditions/Comments

SUPPLY VOLTAGE, VCC

VCC1_CLKDIST 3.135 3.3 3.465 V 3.3 V ± 5%, supply voltage for CLK distribution

VCC2_OUT 3.135 3.3 3.465 V

3.3 V ± 5%, supply voltage for Output Channel 2 and

Output Channel 3

VCC3_OUT 3.135 3.3 3.465 V

3.3 V ± 5%, supply voltage for Output Channel 4, Output

Channel 5, Output Channel 6 and Output Channel 7

VCC4_CLKIN 3.135 3.3 3.465 V 3.3 V ± 5%, supply voltage for the clock input path

VCC5_SYSREF 3.135 3.3 3.465 V 3.3 V ± 5%, supply voltage for the common SYSREF divider

VCC6_OUT 3.135 3.3 3.465 V

3.3 V ± 5%, supply voltage for Output Channel 8, Output

Channel 9, Output Channel 10, and Output Channel 11

VCC7_OUT 3.135 3.3 3.465 V

3.3 V ± 5%, supply voltage for Output Channel 0, Output

Channel 1, Output Channel 12, and Output Channel 13

TEMPERATURE

Ambient Temperature Range, TA −40 +25 +85 °C

1 Maximum values are guaranteed by design and characterization.

SUPPLY CURRENT

For detailed test conditions, see Table 17 and Table 18.

Table 2

Parameter1, 2 Min Typ Max Unit Test Conditions/Comments

CURRENT CONSUMPTION3

VCC1_CLKDIST 87 125 mA

VCC2_OUT4 90 250 mA Typical value is given at TA = 25°C with two LVDS clocks at divide by 8

VCC3_OUT4 52 500 mA

Typical value is given at 25°C with two LVDS high performance clocks,

fundamental frequency of the clock input (fO), two SYSREF clocks (off)

VCC4_CLKIN 16 25 mA

Typical value is given at TA = 25°C with RF synchronization (RFSYNC) input

buffer off

VCC5_SYSREF 23 35 mA Typical value is given at TA = 25°C with internal RF SYNC path off

VCC6_OUT4 90 500 mA

Typical value is given at 25°C with two LVDS high performance clocks at

divide by 2, two SYSREF clocks (off)

VCC7_OUT4 100 500 mA

Typical value is given at 25°C with two LVDS clocks at divide by 8, two SYSREF

clocks (off)

Total Current 458 mA

1 Maximum values are guaranteed by design and characterization.

2 Currents include LVDS termination currents.

3 Maximum values are for all circuits enabled in their worst case power consumption mode, PVT variations, and accounting for peak current draw during temporary

synchronization events.

4 Typical specification applies to a normal usage profile (Profile 1 in Table 17) but very low duty cycle currents (sync events) and some optional features are disabled.

This specification assumes output configurations as described in the test conditions/comments column.

HMC7043 Data Sheet

Rev. B | Page 4 of 43

DIGITAL INPUT/OUTPUT (I/O) ELECTRICAL SPECIFICATIONS

Table 3.

Parameter Min Typ Max Unit Test Conditions/Comments

DIGITAL INPUT SIGNALS (RESET, SLEN, SCLK)

Safe Input Voltage Range −0.1 +3.6 V

Input Load 0.3 pF

Input Voltage

Input Logic High 1.2 VCC V

Input Logic Low 0 0.5 V

SPI Bus Frequency 10 MHz

DIGITAL BIDIRECTIONAL SIGNALS

CONFIGURED AS INPUTS (SDATA, GPIO)

Safe Input Voltage Range −0.1 +3.6 V

Input Capacitance 0.4 pF

Input Resistance 50 GΩ

Input Voltage

Input Logic High 1.22 VCC V

Input Logic Low

0.24

Input Hysteresis 0.2 V Occurs around 0.85 V

GPIO ALARM MUXING/DELAY

Delay from Internal Alarm/Signal to

General-Purpose Output (GPO) Driver

2 ns Does not include tDGPO

DIGITAL BIDIRECTIONAL SIGNALS

CONFIFURED AS OUTPUTS (SDATA, GPIO)

CMOS Mode

Logic 1 Level 1.6 1.9 2.2 V

Logic 0 Level 0 0.1 V

Output Drive Resistance (RDRIVE) 50 Ω

Output Driver Delay (t

DGPO

)

1.5 + 42 × C

LOAD

Approximately 1.5 ns + 0.69 × R

DRIVE

× C

LOAD

(CLOAD in nF)

Maximum Supported DC Current1 0.6 mA

Open-Drain Mode External 1 kΩ pull-up resistor

Logic 1 Level 3.6 V 3.6 V maximum permitted; specifications set by

external supply

Logic 0 Level

0.13

0.28

Against a 1 kΩ external pull-up resistor to 3.3 V

Pull-Down Impedance 60 Ω

Maximum Supported Sink Current1 5 mA

1 Guaranteed by design and characterization for long-term reliability.

CLOCK INPUT PATH SPECIFICATIONS

Table 4.

Parameter Min Typ Max Unit Test Conditions/Comments

CLK INPUT (CLKIN) CHARACTERISTICS

Recommended Input Power, AC-Coupled

Differential −6 +8 dBm

Single-Ended1 −10 +6 dBm Noise floor degrade by 3 dB at fCLKIN = 2400 MHz

Return Loss −12 dB When terminated with 100 Ω differential

Clock Input Frequency (fCLKIN) 200 3200 MHz Fundamental mode; if <1 GHz, set the low frequency

clock input path enable bit (Register 0x0064, Bit 0)

200 6000 MHz Using clock input ÷ 2

Common-Mode Range

0.4

2.4

1 Guaranteed by design and characterization.

Data Sheet HMC7043

Rev. B | Page 5 of 43

ADDITIVE JITTER AND PHASE NOISE CHARACTERISTICS

Table 5.

Parameter1 Min Typ Max Unit Test Conditions/Comments

ADDITIVE JITTER

HMC7044 used as a clock source (see Figure 3)

RMS Additive Jitter <30 fs rms Clock output frequency (fCLKOUT) = 983.04 MHz, BW = 12 kHz to 20 MHz,

clock input slew rate ≥ 8 ns

<15 fs rms fCLKOUT = 2457.6 MHz, BW = 12 kHz to 20 MHz, clock input slew rate ≥ 4 ns

CLOCK OUTPUT PHASE NOISE HMC830 used as a clock source and configured to produce 983.04 MHz

at the output (see Figure 4), input slew rate > 1 V/ns

Absolute Phase Noise

Offset = 1 MHz −144.3 dBc/Hz fCLKOUT = 983.04 MHz, fCLKOUT = 983.04 MHz, divide by 1 at the output

Offset = 10 MHz −154.8 dBc/Hz fCLKOUT = 983.04 MHz, fCLKOUT = 2949.12 MHz, divide by 3 at the output

Offset = 20 MHz −155.2 dBc/Hz fCLKOUT = 983.04 MHz, fCLKOUT = 983.04 MHz, divide by 1 at the output

1 Guaranteed by design and characterization.

CLOCK OUTPUT DISTRIBUTION SPECIFICATIONS

Table 6.

Parameter Min Typ Max Unit Test Conditions/Comments

CLOCK OUTPUT SKEW

CLKOUTx/CLKOUTx to SCLKOUTx/SCLKOUTx Skew

Within One Clock Output Pair

15 |ps| Same pair, same type termination and

configuration

Any CLKOUTx/CLKOUTx to Any SCLKOUTx/

SCLKOUTx 30 |ps| Any pair, same type termination and

configuration

PROPAGATION DELAY CLKIN to CLKOUTx and SCLKOUTx

770

820

870

CLKIN

= 983.04 MHz, all V

set to 3.3 V

CLOCK OUTPUT DIVIDER CHARACTERISTICS

12-Bit Divider Range 1 4094 1, 3, 5, and all even numbers up to 4094

SYSREF CLOCK OUTPUT DIVIDER CHARACTERISTICS

12-Bit Divider Range 1 4094 1, 3, 5, and all even numbers up to 4094;

pulse generator behavior is only

supported for divide ratios ≥ 32

CLOCK OUTPUT ANALOG FINE DELAY

Analog Fine Delay

Adjustment Range1 135 670 ps 24 delay steps, fCLKOUT = 983.04 MHz

Resolution 25 ps fCLKOUT = 983.04 MHz (2949.12 MHz/3)

Maximum Analog Fine Delay Frequency 1600 MHz

CLOCK OUTPUT COARSE DELAY (FLIP FLOP BASED)

Coarse Delay Adjustment Range 0 17 ½ CLKIN period 17 delay steps

Coarse Delay Resolution 169.54 ps fCLKIN = 2949.12 MHz

Maximum Frequency Coarse Delay 1500 MHz

CLOCK OUTPUT COARSE DELAY (SLIP BASED)

Coarse Delay

Adjustment Range 1 to ∞ CLKIN period

Resolution 339.08 ps fCLKIN = 2949.12 MHz

Maximum Frequency Coarse Delay 1600 MHz

1 Guaranteed by design and characterization.

HMC7043 Data Sheet

Rev. B | Page 6 of 43

CLOCK OUTPUT DRIVER CHARACTERISTICS

Table 7.

Parameter Min Typ Max Unit Test Conditions/Comments

CML MODE (LOW POWER)

= 100 Ω, 9.6 mA

−3 dB Bandwidth 1950 MHz Differential output voltage = 980 mV p-p diff

Output Rise Time 175 ps fCLKOUT = 245.76 MHz, 20% to 80%

145 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Fall Time 185 ps fCLKOUT = 245.76 MHz, 20% to 80%

145 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Duty Cycle1 47.5 50 52.5 % fCLKOUT = 1075 MHz (2150 MHz/2)

Differential Output Voltage Magnitude 1390 mV p-p diff fCLKOUT = 245.76 MHz (2949.12 MHz/12)

1360 mV p-p diff fCLKOUT = 983.04 MHz (2949.12 MHz/3)

Common-Mode Output Voltage VCC − 1.05 V fCLKOUT = 245.76 MHz (2949.12 MHz/12)

CML MODE (HIGH POWER) RL = 100 Ω, 14.5 mA

−3 dB Bandwidth 1500 MHz Differential output voltage = 1470 mV p-p diff

Output Rise Time 250 ps fCLKOUT = 245.76 MHz, 20% to 80%

165 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Fall Time

255

CLKOUT

= 245.76 MHz, 20% to 80%

170 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Duty Cycle1 47.5 50 52.5 % fCLKOUT = 1075 MHz (2150 MHz/2)

Differential Output Voltage Magnitude 2000 mV p-p diff fCLKOUT = 245.76 MHz (2949.12 MHz/12)

1800 mV p-p diff fCLKOUT = 983.04 MHz (2949.12 MHz/3)

Differential Output

Voltage Magnitude 590 mV p-p diff fCLKOUT = 3200 MHz

Power −3.6 dBm diff fCLKOUT = 3200 MHz

Common-Mode Output Voltage VCC − 1.6 V fCLKOUT = 245.76 MHz (2949.12 MHz/12)

LVPECL MODE RL = 150 Ω, 4.8 mA

−3 dB Bandwidth 2400 MHz Differential output voltage = 1240 mV p-p diff

Output Rise Time 135 ps fCLKOUT = 245.76 MHz, 20% to 80%

130 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Fall Time 135 ps fCLKOUT = 245.76 MHz, 20% to 80%

130

CLKOUT

= 983.04 MHz, 20% to 80%

Output Duty Cycle1 47.5 50 52.5 % fCLKOUT = 1075 MHz (2150 MHz/2)

Differential Output Voltage Magnitude 1760 mV p-p diff fCLKOUT = 245.76 MHz (2949.12 MHz/12)

1850 mV p-p diff fCLKOUT = 983.04 MHz (2949.12 MHz/3)

Differential Output

Voltage Magnitude 930 mV p-p diff fCLKOUT = 3200 MHz

Power 0.3 dBm diff fCLKOUT = 3200 MHz

Common-Mode Output Voltage VCC − 1.3 V fCLKOUT = 245.76 MHz (2949.12 MHz/12)

LVDS MODE (LOW POWER) 1.75 mA

Maximum Operating Frequency 1700 MHz Differential output voltage = 320 mV p-p diff

Output Rise Time 135 ps fCLKOUT = 245.76 MHz, 20% to 80%

100 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Fall Time 135 ps fCLKOUT = 245.76 MHz, 20% to 80%

95 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Duty Cycle

47.5

52.5

CLKOUT

= 1075 MHz (2150 MHz/2)

Differential Output Voltage Magnitude 390 mV p-p diff fCLKOUT = 245.76 MHz (2949.12 MHz/12)

Common-Mode Output Voltage 1.1 V fCLKOUT = 245.76 MHz (2949.12 MHz/12)

Data Sheet HMC7043

Rev. B | Page 7 of 43

Parameter Min Typ Max Unit Test Conditions/Comments

LVDS MODE (HIGH POWER) 3.5 mA

Maximum Operating Frequency 1700 MHz Differential output voltage = 600 mV p-p diff

Output Rise Time 145 ps fCLKOUT = 245.76 MHz, 20% to 80%

105 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Fall Time

145

CLKOUT

= 245.76 MHz, 20% to 80%

100 ps fCLKOUT = 983.04 MHz, 20% to 80%

Output Duty Cycle1 47.5 50 52.5 % fCLKOUT = 1075 MHz (2150 MHz/2)

Differential Output Voltage Magnitude 750 mV p-p diff fCLKOUT = 245.76 MHz (2949.12 MHz/12)

730 mV p-p diff fCLKOUT = 983.04 MHz (2949.12 MHz/3)

Common-Mode Output Voltage 1.1 V fCLKOUT = 245.76 MHz (2949.12 MHz/12)

CMOS MODE

Maximum Operating Frequency 600 MHz Single-ended output voltage = 940 mV p-p diff

Output Rise Time 425 ps fCLKOUT = 245.76 MHz, 20% to 80%

Output Fall Time

420

CLKOUT

= 245.76 MHz, 20% to 80%

Output Duty Cycle1 47.5 50 52.5 % fCLKOUT = 1075 MHz (2150 MHz/2)

Output Voltage

High VCC V Load current = 1 mA

VCC − 0.5 V Load current = 10 mA

Low

0.07

Load current = 1 mA

0.5 V Load current = 10 mA

1 Guaranteed by design and characterization.

HMC7043 Data Sheet

Rev. B | Page 8 of 43

ABSOLUTE MAXIMUM RATINGS

Table 8.

Parameter Rating

VCC1, VCC2, VCC3, VCC4, VCC5, VCC6, VCC7 to

Ground

−0.3 V to +3.6 V

Maximum Junction Temperature 125°C

Thermal Resistance (Channel to Ground Pad) 7°C/W

Storage Temperature Range −65°C to +125°C

Operating Temperature Range −40°C to +85°C

Peak Reflow Temperature 260°C

ESD Sensitivity Level

Human Body Model (HBM) Class 1C

Charged Device Model (CDM)1 Class 4

1 Per JESD22-C101-F (CDM) standard.

Stresses at or above those listed under Absolute Maximum

Ratings may cause permanent damage to the product. This is a

stress rating only; functional operation of the product at these

or any other conditions above those indicated in the operational

section of this specification is not implied. Operation beyond

the maximum operating conditions for extended periods may

affect product reliability.

ESD CAUTION

Data Sheet HMC7043

Rev. B | Page 9 of 43

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

SCLKOUT9

GPIO

4SDATA

5SCLK

6SLEN

7VCC5_SYSREF

24RSV 23SCLKOUT7 22SCLKOUT7 21CLKOUT6 20CLKOUT6 19VCC3_OUT 18CLKOUT4 17CLKOUT4 16SCLKOUT5 15SCLKOUT5 14RSV 13VCC2_OUT

44 SCLKOUT13

45 SCLKOUT13

46 CLKOUT12

47 CLKOUT12

48 VCC7_OUT

43 SCLKOUT11

42 SCLKOUT11

41 CLKOUT10

40 CLKOUT10

39 VCC6_OUT

38 CLKOUT8

37 CLKOUT8

TOP VIEW

(No t t o Scal e)

HMC7043

CLKOUT2 26

CLKOUT2 27

SCLKOUT3 28

SCLKOUT3 29

VCC1_CLKDIST 30

LDOBYP2 31

BGAPBYP1 32

RESET 33

SCLKOUT1 34

SCLKOUT1 35

CLKOUT0 36

CLKOUT0

8RFSYNCIN

9RFSYNCIN

10 VCC4_CLKIN

11 CLKIN

12 CLKIN

NOTES

1. RSV = RESERVED PIN AND MUST BE T IED TO GROUND.

2. CO NNE CT T HE E X P OSED P AD TO A HIGH QUAL ITY RF/ DC GROUND.

13114-002

Figure 2.

Table 9. Pin Function Descriptions

Pin No. Mnemonic Type 1 Description

1 CLKOUT0 O True Clock Output Channel 0. Default DCLK profile.

2 CLKOUT0 O Complementary Clock Output Channel 0. Default DCLK profile.

SCLKOUT1

True Clock Output Channel 1. Default SYSREF profile.

4 SCLKOUT1 O Complementary Clock Output Channel 1. Default SYSREF profile.

5 RESET I Device Reset Input. Active high. For normal operation, set RESET to 0.

6 BGAPBYP1 Band Gap Bypass Capacitor Connection. Connect a 4.7 µF capacitor to ground. This pin affects all

internally regulated supplies.

7 LDOBYP2 LDO Bypass 2. Connect a 4.7 µF capacitor to ground. The internal digital supply is 1.8 V. This pin is the

LDO bypass for the SYSREF section.

8 VCC1_CLKDIST P 3.3 V Supply for CLK Distribution.

9 SCLKOUT3 O True Clock Output Channel 3. Default SYSREF profile.

10 SCLKOUT3 O Complementary Clock Output Channel 3. Default SYSREF profile.

11 CLKOUT2 O True Clock Output Channel 2. Default DCLK profile.

CLKOUT2

Complementary Clock Output Channel 2. Default DCLK profile.

13 VCC2_OUT P Power Supply for Clock Group 1 (Southwest)—Channel 2 and Channel 3. See the Clock Grouping,

Skew, and Crosstalk section.

14 RSV R Reserved Pin. This pin must be tied to ground.

15 SCLKOUT5 O True Clock Output Channel 5. Default SYSREF profile.

16 SCLKOUT5 O Complementary Clock Output Channel 5. Default SYSREF profile.

17 CLKOUT4 O True Clock Output Channel 4. Default DCLK profile.

18 CLKOUT4 O Complementary Clock Output Channel 4. Default DCLK profile.

19 VCC3_OUT P Power Supply for Clock Group 2 (South)—Channel 4, Channel 5, Channel 6, and Channel 7. See the

Clock Grouping, Skew, and Crosstalk section.

20 CLKOUT6 O True Clock Output Channel 6. Default DCLK profile.

21 CLKOUT6 O Complementary Clock Output Channel 6. Default DCLK profile.

22 SCLKOUT7 O True Clock Output Channel 7. Default SYSREF profile.

23 SCLKOUT7 O Complementary Clock Output Channel 7. Default SYSREF profile.

24 RSV R Reserved Pin. This pin must be tied to ground.

25 CLKIN I Complementary Clock Input.

26 CLKIN I True Clock Input.

HMC7043 Data Sheet

Rev. B | Page 10 of 43

Pin No. Mnemonic Type 1 Description

27 VCC4_CLKIN P Power Supply for the Clock Input Path.

28 RFSYNCIN I True RF Synchronization Input with Deterministic Delay.

29 RFSYNCIN I Complementary RF Synchronization Input with Deterministic Delay.

30 VCC5_SYSREF P Power Supply for Common SYSREF Divider.

31 SLEN I/O SPI Latch Enable.

32 SCLK I/O SPI Clock.

33 SDATA I/O SPI Data.

34 GPIO I/O Programmable General-Purpose Input/Output.

35 SCLKOUT9 O True Clock Output Channel 9. Default SYSREF profile.

36 SCLKOUT9 O Complementary Clock Output Channel 9. Default SYSREF profile.

37 CLKOUT8 O True Clock Output Channel 8. Default DCLK profile.

38 CLKOUT8 O Complementary Clock Output Channel 8. Default DCLK profile.

39 VCC6_OUT P Power Supply for Clock Group 3 (North)—Channel 8, Channel 9, Channel 10, and Channel 11. See the

Clock Grouping, Skew, and Crosstalk section.

40 CLKOUT10 O True Clock Output Channel 10. Default DCLK profile.

CLKOUT10

Complementary Clock Output Channel 10. Default DCLK profile.

42 SCLKOUT11 O True Clock Output Channel 11. Default SYSREF profile.

43 SCLKOUT11 O Complementary Clock Output Channel 11. Default SYSREF profile.

44 SCLKOUT13 O True Clock Output Channel 13. Default SYSREF profile.

45 SCLKOUT13 O Complementary Clock Output Channel 13. Default SYSREF profile.

46 CLKOUT12 O True Clock Output Channel 12. Default DCLK profile.

47 CLKOUT12 O Complementary Clock Output Channel 12. Default DCLK profile.

48 VCC7_OUT P Power Supply for Clock Group 0 (Northwest)—Channel 0, Channel 1, Channel 12, and Channel 13. See

the Clock Grouping, Skew, and Crosstalk section.

EP Exposed Pad. Connect the exposed pad to a high quality RF/dc ground.

1 O is output, I is input, P is power, R is reserved, and I/O is input/output.

Data Sheet HMC7043

Rev. B | Page 11 of 43

TYPICAL PERFORMANCE CHARACTERISTICS

–160

–150

–140

–130

–120

–110

–100

110 100 1000 10000

PHASE NOISE (dBc/Hz)

FREQUENCY OFFSET (kHz)

HMC7044-CLOCK S OURCE

HMC7043

13114-003

HMC7044 AS CLOCK S OURCE:

OUTPUT FREQ = 983. 04M Hz

OUTPUT P OW E R = 3.7d Bm

1MHz, –140.56dBc/ Hz

5MHz, –153.26dBc/ Hz

10MHz, –154.28dBc/ Hz

20MHz, –154.85dBc/ Hz

RMS JITTER ( 12kHz TO 20MHz) : 73.74fs

HMC7043 O UTPUT:

AT FUNDE M E N TAL MO DE

1MHz, –140.30 dBc/ Hz

5MHz, –151.02 dBc/ Hz

10MHz, –151.77 dBc/ Hz

20MHz, –151.97 dBc/ Hz

RMS JITTER = 77.01fs

Figure 3. Additive Jjitter at 983.04 MHz at Output

13114-004

–170

–160

–150

–140

–130

–120

–110

–100

110 100 1000 10000

PHASE NOISE (dBc/Hz)

FREQUENCY OFFSET (kHz)

HMC830-CLOCK S OURCE

HMC7043 HMC830 AS CLOCK S OURCE:

OUTPUT FREQ = 983. 04M Hz

OUTPUT P OW E R = 4dBm

1MHz, –144.49dBc/ Hz

5MHz, –158.38dBc/ Hz

10MHz,–162.61dBc/Hz

20MHz, –164.29dBc/ Hz

HMC7043 O UTPUT:

AT FUNDE M E N TAL MO DE

1MHz, –144.31 dBc/ Hz

5MHz, –153.46 dBc/ Hz

10MHz, –154.78 dBc/ Hz

20MHz, –155.18 dBc/ Hz

Figure 4. Absolute Phase Noise Measured at 983.04 MHz at Output

0.5

1.0

1.5

2.0

2.5

3.0

3.5

100M 1G 3.2G

DIFFERENTIAL OUTPUT VOLTAGE (Vp-p DIFF)

FREQUENCY (Hz)

13114-206

LVPECL

CML100 HIGH

CML100 LOW

LVDS HIGH

CMOS (NOT IN

DIFFERENTIAL MODE)

Figure 5. Differential Output Power vs. Frequency over Various Modes

0.15

0.30

0.45

0.60

0.75

0.90

1.05

1.20

1.35

1.50

1.65

1.80

1.95

2.10

2.25

1.0 1.5 2.0 2.5 3.0 3.5

DIFFERENTIAL OUTPUT VOLTAGE (V p-p)

FRE Q UE NCY ( GHz)

LVPECL

CML 100 HIGH

CML 100 LOW

LVDS HIGH

13114-100

Figure 6.Differential Output Voltage vs. Frequency over Various Modes

DIFFERENTIAL OUTPUT VOLTAGE (Vp-p DIFF)

FREQUENCY (Hz)

0.25

0.5

0.75

1.00

1.25

1.5

1.75

2.00

100M 1G 3G

–40°C

+25°C

+85°C

13114-205

Figure 7. LVPECL Differential Output Power vs. Frequency over Various

Temperatures

–0.4

–0.3

–0.2

–0.1

0.1

0.2

0.3

0.4

00.4 0.8 1.2 1.6 2.0

CLKOUT0/CL KOUT0 V O LTAGE (V)

TIME (n s)

13114-007

Figure 8. Differential CLKOUT0/CLKOUT0 at 2457 MHz, LVPECL

HMC7043 Data Sheet

Rev. B | Page 12 of 43

–1.0

–0.8

–0.6

–0.4

–0.2

0.2

0.4

0.6

0.8

1.0

0 1 2345678910

TIME (n s)

13114-008

CLKO UT0/ CLKO UT0 VOLTAGE (V)

Figure 9. Differential CLKOUT0/CLKOUT0 Voltage at 614.4 MHz, LVPECL

13114-009

–0.5

0.5

1.0

1.5

2.0

2.5

–0.6

–0.4

–0.2

0.2

0.4

0.6

0200 400 600 800 1000

CLOCK GROUP VALID PHASE ALARM V OLTAGE (V)

CLOCK OUP UT VOLTAGE (V)

TIME (ns)

CLKOUT0

CLKOUT2

VALID PHAS E ALARM

Figure 10. Output Channel Synchronization Before and After Rephase

13114-010

–0.5

0.5

1.0

1.5

2.0

2.5

–0.6

–0.4

–0.2

0.2

0.4

0.6

330 335 340 345 350

CLOCK GROUPVALID PHASE ALARM V OLTAGE (V)

CLOCK OUTPUT VOLTAGE (V)

TIME (n s)

CLKOUT0

CLKOUT2

VAL I D P HAS E ALARM

Figure 11. Output Channel Synchronization Before Rephase

13114-011

–0.6

–0.4

–0.2

0.2

0.4

0.6

695 700 705 710 715

CLOCK GROUP VALID PHASE ALARM V OLTAGE (V)

CLOCK OUTPUT VOLTAGE (V)

TIME (ns)

CLKOUT0

CLKOUT2 V ALI D P HAS E ALARM

–0.5

0.5

1.0

1.5

2.0

2.5

Figure 12. Output Channel Synchronization After Rephase

13114-012

DELAY STEP SIZ E (p s)

DELAY STEP

–40°C

+25°C

+85°C

Figure 13. Analog Delay Step Size vs. Delay Step over Temperature,

LVPECL at 983.04 MHz

13114-013

–200

–100

100

200

300

400

500

600

700

800

0 2 4 6 8 10 12 14 16 18 20 22 24 26 28 30

DELAY STEP SIZ E (p s)

DELAY STEP

FUND:FUNDAMENTAL MO DE AT 2949.12MHz

DIS: ANALO G DEL AY I S DISABLED AT 983.04MHz

FUND

DIS

–40°C

+27°C

+85°C

Figure 14. Analog Delay vs. Delay Setting over Temperature, LVPECL at

983.04 MHz

Data Sheet HMC7043

Rev. B | Page 13 of 43

TYPICAL APPLICATION CIRCUITS

100Ω

0.1µF

DOWNSTREAM

DEVICE

LVDS

OUTPUT

HIGH

IMPEDANCE

INPUT

HMC7043

13114-014

Figure 15. AC-Coupled LVDS Output Driver

0.1µF

DOWNSTREAM

DEVICE

CML

OUTPUT

HIGH

IMPEDANCE

INPUT

HMC7043

100Ω 100Ω

VCC

100Ω

13114-015

Figure 16. AC-Coupled CML (Configured High-Z) Output Driver

0.1µF

DOWNSTREAM

DEVICE

CML

OUTPUT

HIGH

IMPEDANCE

INPUT

HMC7043

100Ω

VCC 100Ω

13114-016

Figure 17. AC-Coupled CML (Internal) Output Driver

0.1µF

SELF BIASED

REF, VCXO

INPUTS

HMC7043

13114-017

Figure 18. CLKIN/CLKIN , RFSYNCIN Input Differential Mode

100Ω DOWNSTREAM

DEVICE

LVDS

OUTPUT

HIGH

IMPEDANCE

INPUT

HMC7043

13114-018

Figure 19. DC-Coupled LVDS Output Driver

DOWNSTREAM

DEVICE

(LVPECL)

LVPECL-

COMPATIBLE

OUTPUT

HMC7043

50Ω 50Ω

50Ω

GND

13114-019

Figure 20. DC-Coupled LVPECL Output Driver

CML

OUTPUT

HMC7043

100Ω

VCC

DOWNSTREAM

DEVICE

(CML)

13114-020

Figure 21. DC-Coupled CML (Internal) Output Driver

0.1µF

HMC7043

3.3V

DRIVER 0.1µF

13114-021

Figure 22. CLKIN, RFSYNCIN Input Single-Ended Mode

HMC7043 Data Sheet

Rev. B | Page 14 of 43

TERMINOLOGY

Phase Jitter and Phase Noise

An ideal sine wave has a continuous and even progression of

phase with time from 0° to 360° for each cycle. Actual signals,

however, display a certain amount of variation from ideal phase

progression over time. This phenomenon is phase jitter. Although

many causes can contribute to phase jitter, one major cause is

random noise, which is characterized statistically as being

Gaussian (normal) in distribution.

This phase jitter leads to the energy of the sine wave in the

frequency domain spreading out, producing a continuous power

spectrum. This power spectrum is usually reported as a series of

values whose units are dBc/Hz at a given offset in frequency from

the sine wave (carrier). The value is a ratio (expressed in decibels)

of the power contained within a 1 Hz bandwidth with respect to

the power at the carrier frequency. For each measurement, the

offset from the carrier frequency is also given.

It is meaningful to integrate the total power contained within some

interval of offset frequencies (for example, 10 kHz to 10 MHz).

This is the integrated phase noise over that frequency offset

interval and can be readily related to the time jitter due to the

phase noise within that offset frequency interval.

Phase noise has a detrimental effect on the performance of analog-

to-digital converters (ADCs), digital-to-analog converters (DACs),

and RF mixers. It lowers the achievable dynamic range of the

converters and mixers, although they are affected in somewhat

different ways.

Time Jitter

Phase noise is a frequency domain phenomenon. In the time

domain, the same effect is exhibited as time jitter. When observing

a sine wave, the time of successive zero crossings varies. In a square

wave, the time jitter is a displacement of the edges from their

ideal (regular) times of occurrence. In both cases, the variations in

timing from the ideal are the time jitter. Because these variations

are random in nature, the time jitter is specified in seconds root

mean square (rms) or 1 sigma of the Gaussian distribution.

Time jitter that occurs on a sampling clock for a DAC or an

ADC decreases the signal-to-noise ratio (SNR) and dynamic

range of the converter. A sampling clock with the lowest possible

jitter provides the highest performance from a given converter.

Additive Phase Noise

Additive phase noise is the amount of phase noise that is

attributable to the device or subsystem being measured.

The phase noise of any external oscillators or clock sources is

subtracted, which makes it possible to predict the degree to

which the device impacts the total system phase noise when

used in conjunction with the various oscillators and clock

sources, each of which contributes a phase noise to the total. In

many cases, the phase noise of one element dominates the

system phase noise. When there are multiple contributors to

phase noise, the total is the square root of the sum of squares of

the individual contributors.

Additive Time Jitter

Additive time jitter is the amount of time jitter that is attributable to

the device or subsystem being measured. The time jitter of any

external oscillators or clock sources is subtracted, which makes

it possible to predict the degree to which the device impacts the

total system time jitter when used in conjunction with the various

oscillators and clock sources, each of which contributes a time

jitter to the total. In many cases, the time jitter of the external

oscillators and clock sources dominates the system time jitter.

Data Sheet HMC7043

Rev. B | Page 15 of 43

THEORY OF OPERATION

The HMC7043 is a high performance, clock distribution IC

designed for extending the number of clock signals across the

system with minimal noise contribution. The device can be

used for distributing the noise sensitive reference clocks for high

speed data converters with either parallel or serial (JESD204B)

interfaces, FPGAs, and local oscillators. The HMC7043 is

designed to meet the requirements of demanding base station

designs, and offers a wide range of clock management and

distribution features to simplify baseband and radio card clock

tree designs. The device provides 14 low noise and configurable

outputs to offer flexibility in distributing clocks while applying

frequency division, phase adjustment, cycle slip, and external

signal synchronization options.

The HMC7043 generates up to seven DCLK and SYSREF clock

pairs per the JESD204B interface requirements. The system

designer can generate a lower number of DCLK and SYSREF

pairs, and configure the remaining output signal paths as

DCLKs, additional SYSREFs, or other reference clocks with

independent phase and frequency adjustment. Frequency

adjustment can be accomplished by selecting the appropriate

output divider values.

One of the unique features of the HMC7043 is the independent

flexible phase management of each of the 14 channels. Using a

combination of divider slip based, digital (coarse) and analog

(fine) delay adjustments, each channel can be programmed to

have a different phase offset. The phase adjustment capability

allows the designer to offset board flight time delay variations,

match data converter sample windows, and meet JESD204B

synchronization challenges. The output signal path design of

the HMC7043 is implemented to ensure both linear phase

adjustment steps and minimal noise perturbation when phase

adjustment circuits are turned on.

The HMC7043 provides output clock signals of up to 3.2 GHz,

while having the flexibility to support input reference frequencies of

up to 6 GHz when the internal clock division blocks are turned on.

The higher frequency support enables higher bandwidth RF

designs, and allows for distribution of low noise RF phase-locked

loop (PLL) voltage controlled oscillator (VCO) outputs as well

as other critical clocks across the system.

One of the key challenges in JESD204B system design is ensuring

the synchronization of data converter frame alignment across

the system, from the FPGA or digital front end (DFE) to ADCs

and DACs through a large clock tree that may comprise multiple

clock generation and distribution ICs.

There are two input paths on the HMC7043; one is for the clock

signal that is distributed, and the other may be used as an external

synchronization signal. In typical JESD204B systems, serial data

converter interfaces, there may be a need to ensure that all clock

signals that are sent to the data converters have phases which are

controlled by an FPGA. By virtue of the RF SYNC input, the

device ensures that output signals have a deterministic phase

alignment to this synchronization input. The RF SYNC input

can also implement multiple device clock trees by nesting more

than one HMC7043 to generate an even larger clock distribution

network, while still maintaining phase alignment across the

clock tree.

Offering excellent crosstalk, frequency isolation, and spurious

performance, the device generates independent frequencies in

both single-ended and differential formats including LVPECL,

LVDS, CML, and CMOS, and different bias conditions to

offset varying board insertion losses. The outputs can also be

programmed for ac or dc coupling and 50 Ω or 100 Ω internal

and external termination options.

The HMC7043 is programmed via a 3-wire serial port interface

(SPI). The HMC7043 is offered in a 48-lead, 7 mm × 7 mm,

LFCSP package with the exposed pad to ground.

HMC7043 Data Sheet

Rev. B | Page 16 of 43

DETAILED BLOCK DIAGRAM

SYSREF TIMER

ANALOG

DELAY

CLK DISTRIBUTION PATH

CLKOUT0

SCLKOUT1

MUX

SYNC/PULSOR

CONTROL

TO LEAF DIVIDERS

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

FUNDAMENTAL MODE

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY

CLKOUT2

SCLKOUT3

CLKOUT8

SCLKOUT9

MUX

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY

GPI

SPI

MUX

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

FUNDAMENTAL MODE FUNDAMENTAL MODE

FUNDAMENTAL MODE

ANALOG

DELAY

CLKOUT4

SCLKOUT5

CLKOUT10

SCLKOUT11

MUX

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY MUX

MUX

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

FUNDAMENTAL MODE FUNDAMENTAL MODE

FUNDAMENTAL MODE

LDOs

ANALOG

DELAY

CLKOUT6

SCLKOUT7

CLKOUT12

SCLKOUT13

MUX

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY

BGABYP1 LDOBYP2

SPI

SDATASCLK SLEN

ALARM GENERATION DEVICE

CONTROL

RESETGPIO

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

ANALOG

DELAY MUX

MUX

ANALOG

DELAY

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

COARSE

DIGITAL

DELAY

CYCLE

SLIP/

SYNC

DIVIDER

(1 TO 4094)

CLKIN

RFSYNCIN

13114-022

DIVIDER

÷1, ÷2

Figure 23. Detailed Block Diagram

CLOCK INPUT NETWORK

Input Termination Network—Common for All Input Buffers

The two clock and RFSYNC input buffers share similar architecture

and control features. The input termination network is configurable

to 100 Ω, 200 Ω, and 2 kΩ differentially. It is typically ac-coupled

on the board, and uses the on-chip resistive divider to set the

internal common-mode voltage, VCM, to 2.1 V.

By closing the 50 Ω termination switch (see Figure 24), the network

also can serve as the termination system for an LVPECL driver.

Although the input termination network for the two clock and

RFSYNC input buffers is identical, the buffer behind the

network is different.

2.8V

4kΩ

5kΩ

50Ω

50Ω,

100Ω,

1kΩ

50Ω,

100Ω,

1kΩ

1pF

13033-045

Figure 24. On-Chip Termination Network for Clock and RFSYNC Buffers

Recommendations for Normal Use

For both buffer types, unless there are extenuating circumstances

in the application, use 100 Ω differential termination resistors

to control reflections, to use the on-chip dc bias network to set

the common mode level, and to externally ac couple the input

signals in. Do not use a receiver side dc termination of the

LVPECL signal.

Data Sheet HMC7043

Rev. B | Page 17 of 43

Single-Ended Operation

The buffers can support a single-ended signal with slightly reduced

input sensitivity and bandwidth. If driving any of the buffers

single-ended, ac couple the unused leg of the buffer to ground

at the input of the die.

Maximum Signal Swing Considerations

The internal supplies to these input buffers are supplied directly

from 3.3 V. The ESD network and parasitic diodes can generally

shunt away excess power and protect the internal circuits

(withstanding reference powers above 13 dBm). Nevertheless,

to protect from latch-up concerns, the signals on the reference

inputs must not exceed the 3.3 V internal supply. For a 2.1 V

common mode, 50 Ω single-ended source, this allows ~1200 mV

of amplitude, or 11 dBm maximum reference power.

CLOCK OUTPUT NETWORK

The HMC7043 is a high performance clock buffer, is appropriate

for JESD204B data converters, and much of the uniqueness of a

JESD204B clock generation chip relates to the array of output

channels. In this device, the output network requirements include

• A large number of device clock (DCLK) and synchronization

(SYSREF) channels

• Very good phase noise floor of the DCLK channels that can

be connected to critical data converter sample clock inputs

• Deterministic phase alignment between all output channels

relative to one another

• Fine phase control of synchronization channels with

respect to the DCLK channel

• Frequency coverage to satisfy typical clock rates in systems

• Skew between SYSREF and DCLK channels that is much

less than a DCLK period

• Spur and crosstalk performance that does not impact

system budgets

The HMC7043 output network supports the following recom-

mended features, which are sometimes critical in user applications:

• Deterministic synchronization of the output channels with

respect to an external signal (RFSYNC), which allows

multichip synchronization and clean expansion to larger

systems

• Pulse generator behavior to temporarily generate a

synchronization pulse stream at a user request

• The flexibility to define unused JESD204B SYSREF and

DCLK channels for other purposes

• Glitchless phase control of signals relative to each other

• 50% duty cycle clocks with odd division ratios

• Multimode output buffers with a variety of swings and

termination options

• Skew between all channels is much less than a DCLK period

• Adjustable performance vs. power consumption for less

sensitive clock channels

CLOCK

GATING

SYNC/PULSE GENERATOR

CONTROL

DIGITAL

DELAY AND

RETIME

DIVIDER

LEAF CONTROLLER

SYNC_FSM_STATE

SYNC REQUEST (FROM SPI OR GPI PI N)

PULSE GENERATOR REQUEST (FROM SPI OR GPI PIN)

OUT P UT CHANNEL ×14

SYSREF TIMER

RESET

SYNC

CLKIN PATH

SYSREF INPUT NETWORK

13114-023

Figure 25. Clock Output Network Simplified Diagram

HMC7043 Data Sheet

Rev. B | Page 18 of 43

Each of the 14 output channels are logically identical. The only

distinction between the SYSREF and DCLK channels is in the

SPI configuration, and in how they are used. Each channel

contains independent dividers, phase adjustment, and analog

delay circuits. This combination provides the ultimate flexibility,

cleanly accommodating nonJESD204B devices in the system.

In addition to the 14 output channel dividers, an internal SYSREF

timer continually operates, and the synchronization of the output

channel dividers occurs deterministically with respect to this

timer, which the user can rephased deterministically by the user

through GPI or SPI or deterministically by using the RFSYNCIN/

RFSYNCIN differential pins.

The pulse generator functionality of the JESD204B standard

involves temporarily generating SYSREF output pulses, with

appropriate phasing, to downstream devices. The centralized

SYSREF timer and the associated SYNC/pulse generator control

manage the process of enabling the intended SYSREF channels,

phasing them, and then disabling them for signal integrity and

power saving advantages.

Basic Output Divider Channel

Each of the 14 output channels are logically identical, and support

divide ratios from 1 to 4094. The supported odd divide ratios

(1, 3, or 5) have 50.0% duty cycle. The only distinction between

a SYSREF channel and a device clock channel is in the SPI

configuration and the typical usage of a given channel.

For basic functionality and phase control, each output path

consists of the following:

• Divider—generates the logic signal of the appropriate

frequency and phase

• Digital phase adjust—adjusts the phase of each channel in

increments of ½ clock input cycles

• Retimer—a low noise flip flop to retime the channel,

removing any accumulated jitter

• Analog fine delay—provides a number of ~25 ps delay steps

• Selection mux—selects the fundamental, divider, analog

delay, or an alternate path

• Multimode output buffer—low noise LVDS, CML, CMOS,

or LVPECL

The digital phase adjuster and retimer launch on either clock

phase of the clock input, depending on the digital phase adjust

setpoint (Coarse Digital Delay[4:0]).

To support divider synchronization, arbitrary phase slips, and

pulse generator modes, the following blocks are included:

• A clock gating stage pauses the clock for synchronization

or slip operations

• An output channel leaf (×14) controller that manages slip,

synchronization, and pulse generators with information

from the SYSREF finite state machine (FSM)

Each channel has an array of control signals. Some of the

controls are described in Table 10.

System wide broadcast signals can be triggered from the SPI or

general-purpose input (GPI) port to issue a SYNC command

(to align dividers to the system internal SYSREF timer), issue a

pulse generator stream, (temporarily exporting SYSREF signals to

receivers), or to cause the dividers to slip a number of clock

input cycles to adjust their phases.

Individual dividers can be made sensitive to these events by

adjusting their slip enable, SYNC enable, and Start-Up Mode[1:0]

configuration, as described in Table 11.

When output buffers are configured in CMOS mode and phase

alignment is required among the outputs, additional multislip

delays must be issued for Channel 0, Channel 3, Channel 5,

Channel 6, Channel 9, Channel 10, and Channel 13. The value

of the delay must be as large as half of the selected divider ratio.

Note that this requirement of having additional multislip delays

is not needed when the channels are used in LVPECL, CML, or

LVDS mode.

If a channel is configured to behave as a pulse generator, to

temporarily power up and power down according to the GPI

and SPI pulse generator commands; additional controls define the

behavior outside of the pulse generator chain (see Table 12).

Each divider has an additional phase offset register that adjusts

the start phase or influences the behavior of slip events sent via

the SPI (see Table 13).

Table 14 outlines the typical configuration combinations for a

DCLK channel relative to a SYSREF synchronization channel.

Note that other combinations are possible. Synchronization of

downstream devices can be managed manually, or by using the

pulse generator functionality of the HMC7043. See the Typical

Programming Sequence section for more information about the

differences between the two methods.

Data Sheet HMC7043

Rev. B | Page 19 of 43

Table 10. Basic Divider Controls

Bit Name Description

Channel Enable Channel enable. If set to 0, the channel is disabled. If set to 1, the channel can be enabled depending on the

settings of the Start-Up Mode[1:0], Seven Pairs of 14-Channel Outputs Enable[6:0], and sleep mode bits.

12-Bit Channel Divider[11:0] Divide ratio.12-bit divide ratio, split across two words (MSB and LSB). Set to 0 if not using the channel divider

(Output Mux Selection[1:0] = 2 or 3)

High Performance Mode High performance mode. Adjusts the divider and buffer bias to improve swing/phase noise slightly at the expense of

power. The performance advantage is about 1 dB, and the current penalty depends on whether the divider is enabled.

Coarse Digital Delay[4:0] Digital delay. Adjusts the phase of the divider signal by up to 17 ½ cycles of the clock input. This circuit is

practically noiseless; however, note that a low amount of additional current is consumed.

Fine Analog Delay[4:0] Analog delay. Adjusts the delay of the divider signal in increments of ~25 ps. Set Output Mux Selection[1:0] = 1

to expose this channel. Exposing this channel causes phase noise degradation of up to 12 dB; therefore, do not use

on noise sensitive DCLK channels.

Output Mux Selection[1:0] Output mux selection. 00 = divider channel, 01 = analog delay, 10 = other channel of pair, 11 = input clock.

Fundamental mode can be generated with the divider (12-Bit Channel Divider[11:0] = 1), or via Output Mux

Selection[1:0] = 10 and 12-Bit Channel Divider[11:0] = 0. Because the divider path consumes power and degrades

phase noise slightly, the fundamental mux path is recommended, but at a cost of a deterministic skew vs. a path

that is divider-based. Such skew can be compensated for with delay (digital and analog) on the divider-based

path.

Force Mute[1] Force mute. If 1, and the channel enable is true (channel enable = 1) and Force Mute[0] = 0, the signal just

before the output buffer is asynchronously forced to Logic 0. To see the effect of this, the output buffer must

be enabled, which is dependent on the dynamic driver enable and Start-Up Mode[1:0] controls.

Table 11. Channel Features

Bit Name Description

Slip Enable Slip enable. A channel processes slip requests broadcast from the SPI or GPI (or, if multislip enable = 1, initiated

following a recognized SYNC or pulse generator startup).

SYNC Enable SYNC enable. A channel processes synchronization events broadcast from the SPI or GPI or due to SYNC/RF SYNC (via

the SYSREF FSM) to reset the phase. This signal can be safely toggled on and off to adjust SYNC sensitivity without

risking the state of the divider.

Start-Up Mode[1:0] 00 = asynchronous (normal mode). The divider starts with uncontrolled phase. It is rephased by SYNC events if SYNC

enable = 1.

11 = dynamic (pulse generator mode). The divider monitors pulse generator events broadcast from the SYSREF

controller. It is powered up just before a pulse generator chain, rephased at the start, and powered down after the

pulse generator chain. This mode is only supported for divide ratios > 31.

Table 12. Pulse Generator Mode Behavior Options

Bit Name Description

Dynamic Driver Enable Dynamic output buffer enable (pulse generator mode only).

0 = the output buffer is simply enabled/disabled with the main channel enable.

1 = the output buffer enable is controlled together with the channel divider, which allows it to dynamically power

down outside pulse generator events.

Force Mute[0] Idle at Logic 0 (pulse generator mode only).

1 = if the buffer remains on outside of the pulse generator chain, drive to Logic 0.

0 = if the buffer remains on outside of the pulse generator chain, allow the outputs to float naturally to

approximately VCM.

HMC7043 Data Sheet

Rev. B | Page 20 of 43

Table 13. Multislip Configuration

Bit Name Description

Multislip Enable Allow multislip. This bit determines whether the 12-Bit Multislip Digital Delay[11:0] parameter is used

for multislip operations. Note that a multislip operation is automatically started following a SYNC or

pulse generator initiation if multislip enable = 1.

12-Bit Multislip Digital Delay[11:0] Multislip amount. If multislip enable = 1, any slip events (caused by GPI, SPI, SYNC, or pulse generator

events) repeat the number of times set by 12-Bit Multislip Digital Delay[11:0] to adjust the phase by the

multislip amount × clock input cycles. A value of 0 is not supported if multislip enable = 1. Note that

phase slips are free from a noise and current perspective, that is, no additional power is needed and

with no noise degradation, but they take some time to occur. Each slip operation takes a number of

nanoseconds to complete, and thus the phases do not necessarily stabilize immediately. An alarm is

available for the user to indicate when all phase operations are complete.

Table 14. Typical Configuration Combinations

Bit Name DCLK Pulse Generator SYSREF Manual SYSREF NonJESD204B

12-Bit Channel Divider[11:0] Small Big Big Any

Start-Up Mode-Bit Normal Pulse generator Normal Normal

Fine Analog Delay[4:0] Off Optional Optional Off

Coarse Digital Delay[4:0] Optional Optional Optional Optional

Slip Enable

Optional

Multislip Enable Optional Off Optional Optional

High Performance Mode Optional Off Off Optional

Sync Enable On On On Optional

Dynamic Driver Enable Don’t care On Don’t care Don’t care

Force Mute[1:0] Don’t care On Don’t care Don’t care

Synchronization FSM/Pulse Generator Timing

Figure 25 show a block diagram of the interface of the SYNC/

pulse generator control to the divider channels and the internal

SYSREF timer.

The SYSREF timer counts in periods defined by SYSREF

Timer[11:0], a 12-bit setting from the SPI. The SYSREF

timer sequences the enable, reset, and startup, and disables

the downstream dividers in the event of sync or pulse generator

requests. Program the SYSREF timer count to a submultiple of

the lowest output frequency in the clock network, and never

faster than 4 MHz. To synchronize the divider channels, it is

recommended, though not required, that the SYSREF Timer[11:0]

bits be set to a related frequency that is either a factor or

multiple of other frequencies on the IC.

The pulse generator is defined with respect to the periods of

this SYSREF timer, not with respect to the output period. This

behavior of the pulse generator leads to a timing constraint that

must be considered to prevent any runt pulses from affecting

the pulse generator stream.

Figure 27 shows the start-up behavior of an example divider

that is configured as a pulse generator, with a period matching

the internal SYSREF period.

The startup of the pulse stream occurs a fixed number of clock

input cycles after the FSM transitions to the start phase. Disabling

the pulse generator stream where the logic path is forced to zero

comes from a combinational path directly from the FSM.

Because the divider has the option for nearly arbitrary phase

adjustment, the stop condition can arrive when the pulse stream

is a Logic 1 and create a runt pulse.

For phase offsets of zero to (50% − 8) clock input cycles, and at

clock input frequencies <3 GHz, this condition is met naturally

within the design. For clock input frequencies >3 GHz, it is

recommended to use digital delay or slip offsets to increase the

natural phase offset and avoid the stress conditions.

The situation is avoided by never applying phase offset more

than (50% − 8) clock input cycles to an output channel

configured as a pulse generator.

Data Sheet HMC7043

Rev. B | Page 21 of 43

CLEAR

RESET

RF_SYNC

SYNC

REQUEST

PULSE

GENERATOR

REQUEST

WAIT

STARTUP

PULSE

GENERATOR

TIMEOUT?

SYNC

SETUP PULSE

GENERATOR

SETUP

NOTIFY CHANNEL FSM

WHAT TYPE OF EVENT

IS COMING

DONE

POWER DIVI DERS/S YNC BLOCKS,

PAUSE BLO CKS , RES ET L ATCHES

REMO V E LATCH RES ET,

PREPARE TO S TART CLOCKS

START CLOCKS,

WI TH CL E AN TI M ING ,

SMALL PIPELINE DELAY

WAI T UNT IL THE NUMBER OF

PULS E GE NE RATOR CY CLES

EXPIRES

REMOVE POWER

13114-125

Figure 26. Synchronization FSM Flowchart

FSM STATE STARTUP

DIVIDER CHANNEL

FI X E D NUM BE R OF CLOCK INPUT CY CLES

FROM STATE CHANG E TO STARTUP, AND

ANY INTE NTIONAL DIGITAL/ANALOG OFFSET

IF MUT E S IG NAL ARRIVES QUICKLY

RELATIVE TO SIGNAL TRAIN,

NO RUNT PULSE

PULS E G E NERATOR = 2 DONE

FSM STATE STARTUP

DIVIDER CHANNEL

IF CONTROL IS TOO LATE

RELATIVE TO SI GNAL TRAIN,

THERE IS A RUNT PULSE

PULS E G E NERATOR = 2 DONE

13114-126

Figure 27. Start-Up Behavior of an Example Divider Configured as a Pulse Generator

HMC7043 Data Sheet

Rev. B | Page 22 of 43

Clock Grouping, Skew, and Crosstalk

Although the output channels are logically independent, for

physical reasons, they are first grouped into pairs, called clock

groups. Each clock group shares a reference, an input buffer,

and a SYNC retime flip flop originating from the clock

distribution network.

The second level of grouping is according to the supply pin. Clock

Group 1 (Channel 2 and Channel 3) is on an independent supply,

and the other supply pins are each responsible for two clock groups.

As the output channels are more tightly coupled (by sharing a

clock group or by sharing a supply pin), the skew is minimized.

However, the isolation between those channels suffers.

Table 15 shows the clock grouping by location, and Table 16

show the typical skew and isolation that can be expected and how

it scales with distance between output channels.

Isolation improves as either the aggressor or the affected

frequencies decrease. Nevertheless, for particularly important

clock channels where spurious tones must be minimized, carefully

consider their frequency and channel configurations to isolate

continuously running frequencies onto different supply domains.

Channels configured as pulse generators are normally not an

issue, because they are disabled during normal operation.

Table 15. Supply Pin Clock Grouping by Location

Supply Pin Location Clock Group Channel

VCC2_OUT Southwest 1 2

VCC3_OUT South 2 4

3 6

VCC6_OUT Northeast 4 8

VCC7_OUT Northwest 6 12

0 0

Table 16. Typical Skew and Isolation vs. Distance

Distance

Typical

Skew (ps)

1 GHz Isolation,

Differential (dB)

Distant Supply Group ±20 90 to 100

Closest Neighbor on

Different Supply Group

±15 70

Shared Supply ±10 60

Same Clock Group ±10 45

Data Sheet HMC7043

Rev. B | Page 23 of 43

Output Buffer Details

NORTHWEST NORTHEAST

SOUTHSOUTHWEST

VCC7_OUT

VCC2_OUT

CLKOUT12

VCC6_OUT

VCC3_OUT

RESET

BGAPBYP1

LDOBYP2

VCC1_

CLKDIST

SCLKOUT5

CLKOUT4

CLKOUT6

SCLKOUT7

CLKOUT0

CLKOUT0 SCLKOUT9

GPIO

SPI

VCC5_

SYSREF

VCC4_

CLKIN

SCLKOUT9

RFSYNCIN

CLKIN

SCLKOUT1

CLKOUT2

SCLKOUT3

SCLKOUT13

SCLKOUT11

CLKOUT10

CLKOUT8

13114-026

Figure 28. Clock Grouping

Figure 28 shows the clock groups by supply pin location on the

package. With appropriate supply pin bypassing, the spurious

noise of the outputs is improved.

Table 15 describes how the supply pins of each of the 14 clock

channels are connected within the seven clock groups. Clock

channels that are closest to each other have the best channel to

channel skew performance, but they also have the lowest isolation

from each other. Select critical signals that require high isolation

from each other from groups with distant supply pin locations.

An example of the expected isolation and channel to channel

skew performance of the HMC7043 at 1 GHz is provided in

Table 16.

SYSREF Valid Interrupt

One of the challenges in a JESD204B system is to control and

minimize the latency from the primary system controller IC,

typically an ASIC or FPGA, to the data converters. To estimate

the correct amount of latency in the system, the designer must

know the time required for a master clock generator like the

HMC7043 to provide the correct output phases at each output

channel after receiving the synchronization request. Typically, a

period of time is required on the device to implement the

change requests on the outputs due to internal state machine

cycles, data transfers, and any propagation delays. The SYSREF

valid interrupt is a function to notify the user that the correct

output settings and phase relationships are established, allowing

the user to identify quickly that the desired SYSREF and device

clock states are presented at the outputs of the HMC7043.

The user has the flexibility to assign the SYSREF valid interrupt to

a GPO pin or to use a software flag, set via Register 0x007D, Bit 2,

which the user may poll as necessary. The flag notifies the user

when the system is configured and operating in the desired

state, or conversely when it is not ready.

TYPICAL PROGRAMMING SEQUENCE

To initialize the HMC7043 to an operational state, use the

following programming procedure:

1. Connect the HMC7043 to the rated power supplies. No

specific power supply sequencing is necessary.

2. Release the hardware reset by switching from Logic 1 to

Logic 0 when all supplies are stable.

3. Load the configuration updates (provided by Analog

Devices, Inc.) to specific registers (see Table 40).

4. Program the SYSREF timer. Set the divide ratio (a submultiple

of the lower output channel frequency). Set the pulse

generator mode configuration, for example, selecting the

level sensitivity option and the number of pulses desired.

5. Program the output channels. Set the output buffer modes

(for example, LVPECL, CML, and LVDS). Set the divide

ratio, channel start-up mode, coarse/analog delays, and

performance modes.

6. Ensure the clock input signal are provided to CLKIN.

HMC7043 Data Sheet

Rev. B | Page 24 of 43

7. Issue a software restart to reset the system and initiate

calibration. Toggle the restart dividers/FSMs bit to 1 and

then back to 0.

8. Send a sync request via the SPI (set the reseed request bit)

to align the divider phases and send any initial pulse

generator stream.

9. Wait six SYSREF periods (6 × SYSREF Timer[11:0]) to

allow the outputs to phase appropriately (~3 μs in typical

configurations).

10. Confirm that the outputs have all reached their phases by

checking that the clock outputs phases status bit = 1.

11. At this time, initialize any other devices in the system.

Configure the slave JESD204B devices in the system to

operate with the SYSREF signal outputs from the HMC7043.

The SYSREF channels from the HMC7043 can be on either

asynchronously or dynamically, and may temporarily turn

on for a pulse generator stream.

12. Slave JESD204B devices in the system must be configured

to monitor the input SYSREF signal exported from the

HMC7043. At this point, SYSREF channels from the

HMC7043 can either be on asynchronously (running) or on

dynamically (temporarily turn on for a pulse generator train).

13. When all JESD204B slaves are powered and ready, send a

pulse generator request to send out a pulse generator chain on

any SYSREF channels programmed for pulse generator mode.

The system is initialized.

For power savings and the reduction of the cross coupling of

frequencies on the HMC7043, shut down the SYSREF channels.

1. Program each JESD204B slave to ignore the SYSREF input

channel.

2. On the HMC7043, disable the individual channel enable bits

of each SYSREF channel.

To resynchronize one or more of the JESD204B slaves, use the

following procedure:

1. Set the channel enable and SYNC enable bit of the SYSREF

channel of interest.

2. To prevent an output channel from responding to a sync

request, disable the SYNC enable mask of each channel so

that it continues to run normally without a phase adjustment.

3. Issue a reseed request to phase the SYSREF channel

properly with respect to the DCLK.

4. Enable the JESD204B slave sensitivity to the SYSREF channel.

5. If the SYSREF channel is in pulse generator mode, wait at

least 20 SYSREF periods from Step 3, and issue a pulse

generator request.

POWER SUPPLY CONSIDERATIONS

The output buffers are susceptible to supply with a certain

extent. The output buffers are also susceptible to supply noise,

but to a lesser extent. A noise tone of −60 dBV at a 40 MHz

offset results in a −90 dBc tone at the output of the buffers in

CML mode and −85 dBc in LVPECL mode. This result is a

relatively flat frequency response, and these numbers are

measured differentially. Phase noise/spurs caused by supply

noise on the output buffers do not scale with output frequency.

Table 17 lists the supply network of the HMC7043 by pin, showing

the relevant functional blocks. Three different usage profiles are

defined for the network, not including the output channel

supplies, which are accounted for separately.

The values listed under Profile 0 to Profile 2 in Table 17 and

Table 18 are the typical currents of that block or feature. If a

number is not listed in a profile column, a typical profile does

not exist for that block or feature, but the user can mix and

match features outside of the profile list, and can determine

what the power consumption is going to be given the current

listings per feature.

Data Sheet HMC7043

Rev. B | Page 25 of 43

Table 17. Supply Network of the HMC7043 by Pin for VCC1_CLKDIST, VCC4_CLKIN, and VCC5_SYSREF

Circuit Block Comment Typical Current (mA)

Profile1

0 1 2

VCC1_CLKDIST

Regulator to 1.8 V, Bypassed on LDOBYP2 2 2 2 2

SYSREF Timer 1 1

GPO Driver in High Speed Mode2

Clock Input Distribution Network Minimum possible value 84 8 84 34

Sync Retiming Network Minimum possible value3 8

Subtotal for VCC1_CLKDIST 10 87 36

VCC4_CLKIN

CLKIN/CLKIN Buffer 16 16 16

CLKIN/CLKIN Path Extra current for divide by 2 7

RFSYNCIN/RFSYNCIN4 Retimer 3

RFSYNCIN/RFSYNCIN Buffer 9

Subtotal or VCC4_CLKIN 0 16 16

VCC5_SYSREF

SYSREF Input Network 11 11

SYSREF Counter Base 12 12

SYSREF Counter, SYNC Network

Subtotal for VCC5_SYSREF 27 0 23 0

Subtotal (Without Output Paths) 10 126 52

1 Profile 0 is sleep mode; Profile 1 is power-up defaults, SYSREF timer running and RFSYNC buffer is disabled; Profile2 is only one clock output enabled, SYSREF timer is

not running and RFSYNC buffer is disabled.

2 The current is highly dependent on rate of input/output and load of input/output traces. For heavily loaded traces, it is recommended to use a series resistance of

~100 Ωto minimize the IR drop on the internal regulator during transitions.

3 A temporary current only.

4 Transient current in synchronization mode, can be temporarily enabled when using external synchronization.

HMC7043 Data Sheet

Rev. B | Page 26 of 43

Table 18. Supply Network of the HMC7043 by Pin for the Clock Output Network

Per Output Channel Comment Typical Current (mA)

Profile1

0 1 2 3 4

Digital Regulator and Other Sources

2.5

0.5

2.5

Buffer

LVPECL Including term currents 43 43 43 43

CML100

High Power

Including term currents

Low Power 24

LVDS

High Power At 307 MHz 10 10

Low Power 8

CMOS

At 100 MHz, both sections

Channel Mux Included2

Different Power Modes Deleted 2 2 2 2

Digital Delay

Off Included2

Setpoint > 1 3 3 3

Analog Delay

Off Included2 0

Minimum Setting Glitchless mode enabled 9 9

Maximum Setting 9 9

Divider Logic

0 Not using divider path Included2 0 0

÷1 27

÷2

÷3 31

÷4 28

÷5 30

÷6 26

÷8 28

÷16 29 29

÷32 29

÷2044 29 29

SYNC Logic

Slip Logic3 4

Subtotal 2.5 48 87 13 89

1 Profile 0 is sleep mode; Profile 1 is fundamental mode; Profile 2 is SYSREF channel matched to fundamental mode; Profile 3 is LVDS—high power signal source from

other channel; and Profile 4 is worst case configuration for power consumption of a channel.

2 The base current consumption of the circuit (for example, mux) is included in the buffer typical current.

3 Currents only occur temporarily during a synchronization event.

Data Sheet HMC7043

Rev. B | Page 27 of 43

SERIAL CONTROL PORT

SERIAL PORT INTERFACE (SPI) CONTROL

The HMC7043 can be controlled via the SPI using 24-bit

registers and three pins: serial port enable (SLEN) serial data

input/output (SDATA), and serial clock (SCLK).

The 24-bit register, shown in Table 19, consists of the following:

• 1-bit read/write command

• 2-bit multibyte field (W1, W0)

• 13-bit address field (A12 to A0)

• 8-bit data field (D7 to D0)

Table 19. SPI Bit Map

MSB LSB

Bit 23 Bit 22 Bit 21 Bits[20:8] Bits[7:0]

R/W W1 W0 A12 to A0 D7 to D0

Typical Read Cycle

A typical read cycle is shown in Figure 29 and occurs as follows:

1. The master (host) asserts both SLEN and SDATA to

indicate a read, followed by a rising edge SCLK. The slave

(HMC7043) reads SDATA on the first rising edge of SCLK

after SLEN. Setting SDATA high initiates a read.

2. The host places the 2-bit multibyte field to be written to

low (0) on the next two falling edges of SCLK. The

HMC7043 registers the 2-bit multibyte field on the next

two rising edges of SCLK.

3. The host places the 13-bit address field (A12 to A0) MSB

first on SDATA on the next 13 falling edges of SCLK. The

HMC7043 registers the 13-bit address field (MSB first) on

SDATA over the next 13 rising edges of SCLK.

4. The host registers the 8-bit data on the next eight rising

edges of SCLK. The HMC7043 places 8-bit data (D7 to D0)

MSB first on the next eight falling edges of SCLK.

5. Deassertion of SLEN completes the register read cycle.

Typical Write Cycle

A typical write cycle is shown in Figure 30 and occurs as follows:

1. The master (host) asserts both SLEN and SDATA to

indicate a read, followed by a rising edge SCLK. The slave

(HMC7043) reads SDIO on the first rising edge of SCLK

after SLEN. Setting SDATA low initiates a write.

2. The host places the 2-bit multibyte field to be written to

low (0) on the next two falling edges of SCLK. The

HMC7043 registers the 2-bit multibyte field on the next

two rising edges of SCLK.

3. The host places the13-bit address field (A12 to A0), MSB

first, on SDATA on the next 13 falling edges of SCLK. The

HMC7043 registers the 13-bit address field (MSB first) on

SDIO over the next 13 rising edges of SCLK.

4. The host places the 8-bit data (D7 to D0) MSB first on the

next eight falling edges of SCLK. The HMC7043 register

the 8-bit data (D7 to D0) MSB first on the next eight rising

edges of SCLK.

5. The final rising edge of SCLK performs the internal data

transfer into the register file, updating the configuration of

the device.

6. Deassertion of SLEN completes the register write cycle.

SCLK 1

XREAD W1 W0 A12 A11 A0 D7 D6 D0

2 3 4 516 17 18 24

SDATA

SLEN

13114-128

Figure 29. SPI Timing Diagram, Read Operation

SCLK 1

XWRITE W1 W0 A12 A11 A0 D7 D6 D0

2 3 4 5 16 17 18 24

SDATA

SLEN

13114-129

Figure 30. SPI Timing Diagram, Write Operation

HMC7043 Data Sheet

Rev. B | Page 28 of 43

CONTROL REGISTERS

CONTROL REGISTER MAP

Table 20. Control Register Map

Address

(Hex) Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)

Default

Value

(Hex)

Global Control

0x0000 Global soft reset

control

Reserved Soft reset 0x00

0x0001 Global request

and mode

control

Reseed

request

High performance

distribution path

Reserved Reserved Mute output

drivers

Pulse

generator

request

Restart

dividers/

FSMs

Sleep mode 0x00

0x0002 Reserved Multislip

request

Reserved 0x00

0x0003 Global enable

control

Reserved RF

reseeder

enable

Reserved SYSREF

timer

enable

Reserved Reserved 0x34

0x0004 Reserved Seven Pairs of 14-Channel Outputs Enable[6:0] 0x7F

0x0005 Global mode

and enable

control

Reserved 0x0F

0x0006 Global clear

alarms

Reserved Clear alarms 0x00

0x0007

Global

miscellaneous

control

Reserved

0x00

0x0008 Reserved (scratchpad) 0x00

0x0009

Reserved

0x00

Input Buffer

0x000A CLKIN0/CLKIN0

input buffer

control

Reserved Input Buffer Mode[3:0] Buffer enable 0x07

0x000B

CLKIN1/CLKIN1

input buffer

control

Reserved

Input Buffer Mode[3:0]

Buffer enable

0x07

GPIO/SDATA Control

0x0046 GPI control Reserved GPI Selection [2:0] GPI enable 0x00

0x0050 GPO control Reserved GPO Selection[4:0] GPO

mode

GPO enable 0x37

0x0054 SDATA control Reserved SDATA

mode

SDATA enable 0x03

SYSREF/SYNC

0x005A Pulse generator

control

Reserved Pulse Generator Mode Selection[2:0] 0x00

0x005B SYNC control Reserved SYNC

retime

Reserved SYNC invert

polarity

0x04

0x005C SYSREF timer

control

SYSREF Timer[7:0] (LSB) 0x00

0x005D Reserved SYSREF Timer[11:8](MSB) 0x01

Clock Distribution Network

0x0064 Clock input

control

Reserved Divide

by 2 on

clock

input

Low

frequency

clock input

0x00

0x0065

Analog delay

common

control

Reserved

Analog delay

low power

mode

0x00

Alarm Masks Register

0x0071

Alarm mask

control

Reserved

Sync

request

mask

Reserved

Clock

outputs

phase

status

mask

SYSREF

sync

status

mask

Reserved

0x10

Product ID Registers

0x0078 Product ID Product ID Value[7:0] (LSB)

0x0079 Product ID Value[15:8] (Mid)

0x007A Product ID Value[23:16] (MSB)

Data Sheet HMC7043

Rev. B | Page 29 of 43

Address

(Hex) Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)

Default

Value

(Hex)

Alarm Readback Status Registers

0x007B Readback

Reserved Alarm signal

0x007D Alarm readback Reserved Sync

request

status

Reserved Clock

outputs

phases

status

SYSREF

sync

status

Reserved

0x007F Alarm readback Reserved

SYSREF Status Register

0x0091 SYSREF status

Reserved Channel

outputs

FSM busy

SYSREF FSM State[3:0] 0x00

Other Controls

0x0098

Reserved

0x00

0x0099 Reserved Reserved 0x00

0x009D Reserved Reserved 0xAA

0x009E Reserved Reserved 0xAA

0x009F Reserved Reserved 0x55

0x00A0 Reserved Reserved 0x56

0x00A2 Reserved Reserved 0x03

0x00A3 Reserved Reserved 0x00

0x00A4 Reserved Reserved 0x00

0x00AD Reserved Reserved 0x00

0x00B5 Reserved Reserved 0x00

0x00B6 Reserved Reserved 0x00

0x00B7 Reserved Reserved 0x00

0x00B8 Reserved Reserved 0x00

Clock Distribution

0x00C8 Channel

Output 0

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x00C9 12-Bit Channel Divider[7:0] (LSB) 0x04

0x00CA Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x00CB Reserved Fine Analog Delay[4:0] 0x00

0x00CC Reserved Coarse Digital Delay[4:0] 0x00

0x00CD 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x00CE Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x00CF Reserved Output Mux Selection[1:0] 0x00

0x00D0

Idle at Zero[1:0]

Dynamic

driver

enable

Driver Mode[1:0]

Reserved

Driver Impedance[1:0]

0x01

0x00D2

Channel

Output 1

control

High

performance

mode

SYNC enable

Slip enable

Reserved

Start-Up Mode[1:0]

Multislip

enable

Channel

enable

0xFD

0x00D3 12-Bit Channel Divider[7:0] (LSB) 0x00

0x00D4 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x01

0x00D5 Reserved Fine Analog Delay[4:0] 0x00

0x00D6 Reserved Coarse Digital Delay[4:0] 0x00

0x00D7 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x00D8 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x00D9 Reserved Output Mux Selection[1:0] 0x00

0x00DA Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

HMC7043 Data Sheet

Rev. B | Page 30 of 43

Address

(Hex) Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)

Default

Value

(Hex)

0x00DC Channel

Output 2

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x00DD 12-Bit Channel Divider[7:0] (LSB) 0x08

0x00DE Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x00DF Reserved Fine Analog Delay[4:0] 0x00

0x00E0 Reserved Coarse Digital Delay[4:0] 0x0

0x00E1 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x00E2 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x00E3 Reserved Output Mux Selection[1:0] 0x00

0x00E4 Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x01

0x00E6 Channel

Output 3

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xFD

0x00E7 12-Bit Channel Divider[7:0] (LSB) 0x00

0x00E8 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x01

0x00E9 Reserved Fine Analog Delay[4:0] 0x00

0x00EA Reserved Coarse Digital Delay[4:0] 0x00

0x00EB 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x00EC Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x00ED Reserved Output Mux Selection[1:0] 0x00

0x00EE Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

0x00F0 Channel

Output 4

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x00F1 12-Bit Channel Divider[7:0] (LSB) 0x02

0x00F2 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x00F3 Reserved Fine Analog Delay[4:0] 0x00

0x00F4 Reserved Coarse Digital Delay[4:0] 0x00

0x00F5 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x00F6 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x00F7 Reserved Output Mux Selection[1:0] 0x00

0x00F8

Idle at Zero[1:0]

Dynamic

driver

enable

Driver Mode[1:0]

Reserved

Driver Impedance[1:0]

0x01

0x00FA

Channel

Output 5

control

High

performance

mode

SYNC enable

Slip enable

Reserved

Start-Up Mode[1:0]

Multislip

enable

Channel

enable

0xFD

0x00FB 12-Bit Channel Divider[7:0] (LSB) 0x00

0x00FC

Reserved

12-Bit Channel Divider[11:8] (MSB)

0x01

0x00FD Reserved Fine Analog Delay[4:0] 0x00

0x00FE

Reserved

Coarse Digital Delay[4:0]

0x00

0x00FF 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x0100 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0101 Reserved Output Mux Selection[1:0] 0x00

0x0102 Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

Data Sheet HMC7043

Rev. B | Page 31 of 43

Address

(Hex) Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)

Default

Value

(Hex)

0x0104 Channel

Output 6

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x0105 12-Bit Channel Divider[7:0] (LSB) 0x02

0x0106 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x0107 Reserved Fine Analog Delay[4:0] 0x00

0x0108 Reserved Coarse Digital Delay[4:0] 0x00

0x0109 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x010A Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x010B Reserved Output Mux Selection[1:0] 0x00

0x010C Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x01

0x010E Channel

Output 7

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xFD

0x010F 12-Bit Channel Divider[7:0] (LSB) 0x00

0x0110 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x01

0x0111 Reserved Fine Analog Delay[4:0] 0x00

0x0112 Reserved Coarse Digital Delay[4:0] 0x00

0x0113 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x0114 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0115 Reserved Output Mux Selection[1:0] 0x00

0x0116 Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

0x0118 Channel

Output 8

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x0119 12-Bit Channel Divider[7:0] (LSB) 0x02

0x011A Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x011B Reserved Fine Analog Delay[4:0] 0x00

0x011C Reserved Coarse Digital Delay[4:0] 0x00

0x011D 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x011E Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x011F Reserved Output Mux Selection[1:0] 0x00

0x0120

Idle at Zero[1:0]

Dynamic

driver

enable

Driver Mode[1:0]

Reserved

Driver Impedance[1:0]

0x01

0x0122

Channel

Output 9

control

High

performance

mode

SYNC enable

Slip enable

Reserved

Start-Up Mode[1:0]

Multislip

enable

Channel

enable

0xFD

0x0123 12-Bit Channel Divider[7:0] (LSB) 0x00

0x0124

Reserved

12-Bit Channel Divider[11:8] (MSB)

0x01

0x0125 Reserved Fine Analog Delay[4:0] 0x00

0x0126

Reserved

Coarse Digital Delay[4:0]

0x00

0x0127 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x0128 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0129 Reserved Output Mux Selection[1:0] 0x00

0x012A Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

HMC7043 Data Sheet

Rev. B | Page 32 of 43

Address

(Hex) Register Name Bit 7 (MSB) Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 (LSB)

Default

Value

(Hex)

0x012C Channel

Output 10

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x012D 12-Bit Channel Divider[7:0] (LSB) 0x02

0x012E Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x012F Reserved Fine Analog Delay[4:0] 0x00

0x0130 Reserved Coarse Digital Delay[4:0] 0x00

0x0131 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x0132 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0133 Reserved Output Mux Selection[1:0] 0x00

0x0134 Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x01

0x0136 Channel

Output 11

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xFD

0x0137 12-Bit Channel Divider[7:0] (LSB) 0x00

0x0138 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x01

0x0139 Reserved Fine Analog Delay[4:0] 0x00

0x013A Reserved Coarse Digital Delay[4:0] 0x00

0x013B 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x013C Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x013D Reserved Output Mux Selection[1:0] 0x00

0x013E Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

0x0140 Channel

Output 12

control

High

performance

mode

SYNC enable Slip enable Reserved Start-Up Mode[1:0] Multislip

enable

Channel

enable

0xF3

0x0141 12-Bit Channel Divider[7:0] (LSB) 0x10

0x0142 Reserved 12-Bit Channel Divider[11:8] (MSB) 0x00

0x0143 Reserved Fine Analog Delay[4:0] 0x00

0x0144 Reserved Coarse Digital Delay[4:0] 0x00

0x0145 12-Bit Multi-Slip Digital Delay[7:0] (LSB) 0x00

0x0146 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0147 Reserved Output Mux Selection[1:0] 0x00

0x0148

Idle at Zero[1:0]

Dynamic

driver

enable

Driver Mode[1:0]

Reserved

Driver Impedance[1:0]

0x01

0x014A

Channel

Output 13

control

High

performance

mode

SYNC enable

Slip enable

Reserved

Start-Up Mode [1:0]

Multislip

enable

Channel

enable

0xFD

0x014B 12-Bit Channel Divider[7:0] (LSB) 0x00

0x014C

Reserved

12-Bit Channel Divider[11:8] (MSB)

0x01

0x014D Reserved Fine Analog Delay[4:0] 0x00

0x014E

Reserved

Coarse Digital Delay[4:0]

0x00

0x014F 12-Bit Multislip Digital Delay[7:0] (LSB) 0x00

0x0150 Reserved 12-Bit Multislip Digital Delay[11:8] (MSB) 0x00

0x0151 Reserved Output Mux Selection[1:0] 0x00

0x0152 Idle at Zero[1:0] Dynamic

driver

enable

Driver Mode[1:0] Reserved Driver Impedance[1:0] 0x30

Data Sheet HMC7043

Rev. B | Page 33 of 43

CONTROL REGISTER MAP BIT DESCRIPTIONS

Global Control (Register 0x0000 to Register 0x0009)

Table 21. Global Soft Reset Control

Address Bits Bit Name Settings Description Access

0x0000 [7:1] Reserved Reserved RW

Soft reset

Resets all registers, dividers, and FSMs to default values

Table 22. Global Request and Mode Control

Address Bits Bit Name Settings Description Access

0x0001 7 Reseed request Requests the centralized resync timer and FSM to reseed any of the output

dividers that are programmed to pay attention to sync events. This signal is

rising edge sensitive, and is only acknowledged if the resync FSM has

completed all events (has finished any previous pulse generator and/or

sync events, and is in the done state (SYSREF FSM State[3:0] = 0010).

High performance

distribution path

High performance distribution path select. The clock distribution path

has two modes.

0 Power priority.

1 Noise priority. Provides the option for better noise floors on the divided

output signals.

5 Reserved Reserved.

4 Reserved Reserved.

3 Mute output drivers Mutes the output drivers (dividers still run in the background).

2 Pulse generator request Asks for a pulse stream (see the Typical Programming Sequence section).

1 Restart dividers/FSMs Resets all dividers and FSMs. Does not affect configuration registers.

0 Sleep mode Forces shutdown. Output network, and I/O buffers are disabled.

0x0002 [7:2] Reserved Reserved. RW

1 Multislip request Requests a slip or multislip event from all divider channels that are

sensitive to slip or multislip commands. The dividers are rising edge

sensitive and take some time to process the request, after which the

phase synchronization alarm is asserted.

0 Reserved Reserved.

Table 23. Global Enable Control

Address Bits Bit Name Settings Description Access

0x0003 [7:6] Reserved Reserved RW

5 RF reseeder enable Enable RF reseed for SYSREF

[4:3] Reserved Reserved

2 SYSREF timer enable Enable internal SYSREF time reference

1 Reserved Reserved

0 Reserved Reserved

0x0004 7 Reserved Reserved RW

[6:0] Seven Pairs of 14-Channel Outputs Enable[6:0] [0] Enable Channel 0 and 1

[1]

Enable Channel 2 and 3

[2] Enable Channel 4 and 5

[3] Enable Channel 6 and 7

[4] Enable Channel 8 and 9

[5] Enable Channel 10 and 11

[6] Enable Channel 12 and 13

Table 24. Global Mode and Enable Control

Address Bits Bit Name Settings Description Access

0x0005 [7:0] Reserved Reserved RW

HMC7043 Data Sheet

Rev. B | Page 34 of 43

Table 25. Global Clear Alarms

Address Bits Bit Name Settings Description Access

0x0006 [7:1] Reserved Reserved RW

0 Clear alarms Clear latched alarms

Table 26. Global Miscellaneous Control

Address Bits Bit Name Settings Description Access

0x0007 [7:0] Reserved Reserved. RW

0x0008 [7:0] Reserved (scratchpad) Reserved. The user can write/read to this register to confirm input/outputs

to the HMC7043. This register does not affect device operation.

0x0009 [7:0] Reserved Reserved. RW

Input Buffer (Register 0x000A to Register 0x000B)

Table 27. CLKIN/CLKIN and RFSYNCIN/RFSYNCIN Input Buffer Control

Address Bits Bit Name Settings Description Access

0x000A, 0x000B [7:5] Reserved Reserved RW

[4:1] Input Buffer Mode[3:0] Input buffer control

[0] Enable internal 100 Ω termination

[1] Enable ac coupling input mode

[2] Enable LVPECL input mode

[3] High-Z input enable

0 Buffer enable Enable input buffer

GPIO/SDATA Control (Register 0x0046 to Register 0x0054)

Table 28. GPI Control

Address Bits Bit Name Settings Description Access

0x0046 [7:4] Reserved Reserved RW

[3:1] GPI Selection[2:0] Select the GPI functionality, Bits[2:0]

0000 Select the GPI functionality, Bits[2:0]

0001

Reserved

0010

Put the chip into sleep mode

0011 Issue a mute

0100 Issue a pulse generator request

0101 Issue a reseed request

0110 Issue a restart request

0111 Reserved

1000 Issue a slip request

1001 Reserved

1010 Reserved

1011 Reserved

1100 Reserved

1101

Reserved.

1110 Reserved

1111 Reserved.

GPI enable

GPI function enable. Before changing the function of the pin, disable it first,

and then reenable it after the function change.1

1 Note that it is possible to have a GPIO delete pin configured as both an output and an input.

Data Sheet HMC7043

Rev. B | Page 35 of 43

Table 29. GPO Control

Address Bits Bit Name Settings Description Access

0x0050 7 Reserved Reserved RW

[6:2] GPO Selection[4:0] Select the GPO functionality, Bits[4:0]

00000 Alarm signal

00001 SDATA from SPI communication

00010 SYSREF sync status has not synchronized since reset

00011 Clock outputs phase status

00100 Sync request status signal

00101 Channel outputs FSM busy

00110 SYSREF FSM State 0

00111 SYSREF FSM State 1

01000 SYSREF FSM State 2

01001 SYSREF FSM State 3

01010

Force Logic 1 to GPO

01011 Force Logic 0 to GPO

01100 Reserved

01101 Reserved

01110 Reserved

01111

Reserved

10000 Reserved

10001 Reserved

10010 Reserved

10011 Reserved

10100 Reserved

10101 Reserved

10110 Reserved

10111 Reserved

11000 Reserved

11001 Pulse generator request status signal

11010 Reserved

11011

Reserved

11100 Reserved

11101 Reserved

11110 Reserved

11111 Reserved

1 GPO mode Selects the mode of GPO driver

0 Open-drain mode

1 CMOS mode

0 GPO enable GPO driver enable

Table 30. SDATA Control

Address Bits Bit Name Settings Description Access

0x0054 [7:2] Reserved Reserved RW

1 SDATA mode Selects the mode of SDATA driver

Open-drain mode

1 CMOS mode

0 SDATA enable SDATA driver enable

HMC7043 Data Sheet

Rev. B | Page 36 of 43

SYSREF/SYNC (Register 0x005A to Register 0x005D)

Table 31. Pulse Generator Control

Address

Bits

Bit Name

Settings

Description

Access

0x005A [7:3] Reserved Reserved. RW

[2:0] Pulse Generator

Mode

Selection[2:0]

SYSREF output enable with pulse generator.

000 Level sensitive. When the GPI is configured to issue a pulse generator

request (GPI Selection[2:0] = 100), or a pulse generator request is issued

through the SPI or as a SYNC pin-based pulse generator, run the pulse

generator. Otherwise, stop the pulse generator.

001

1 pulse.

010

2 pulses.

011 4 pulses.

100 8 pulses.

101 16 pulses.

110 16 pulses.

111 Continuous mode (50% duty cycle).

Table 32. SYNC Control

Address Bits Bit Name Settings Description Access

0x005B [7:3] Reserved Reserved RW

2 SYNC retime

0 Bypass the retime (non-deterministic SYNC event condition)

1 Retime the external SYNC (deterministic SYNC event condition)

1 Reserved Reserved

0 SYNC polarity SYNC polarity (must be 0 if not using CLKIN/CLKIN as the input)

0 Positive

1 Negative

Table 33. SYSREF Timer Control

Address Bits Bit Name Settings Description Access

0x005C [7:0] SYSREF Timer[7:0]

(LSB)

12-bit SYSREF timer setpoint LSB. This sets the internal beat frequency of

the master timer, which controls synchronization and pulse generator

events. Set the 12-bit timer to a submultiple of the lowest output SYSREF

frequency, and program it to be no faster than 4 MHz.

0x005D [7:4] Reserved Reserved. RW

[3:0] SYSREF Timer[11:8]

(MSB)

12-bit SYSREF timer setpoint MSB.

Clock Distribution Network (Register 0x0064 to Register 0x0065)

Table 34. Clock Input Control

Address Bits Bit Name Settings Description Access

0x0064

[7:2]

Reserved

1 Divide by 2 on clock input Use divide by 2 on clock input path

0 Low frequency clock input Changes bias to Class A for low frequency clock input

Table 35. Analog Delay Common Control

Address Bits Bit Name Settings Description Access

0x0065 [7:1] Reserved Reserved. RW

0 Analog delay low

power mode

Analog delay is low power mode. Can save power for low settings of analog

delay, but is not glitchless between setpoints.

Data Sheet HMC7043

Rev. B | Page 37 of 43

Alarm Masks Register (Register 0x0071)

Table 36. Alarm Mask Control Register

Address Bits Bit Name Settings Description Access

0x0071 [7:5] Reserved Reserved RW

4 Sync request mask If set, allow sync request signals to generate an alarm signal

3 Reserved Reserved

2 Clock outputs phase status

mask

If set, allow clock output phases status signal to generate an alarm

signal

1 SYSREF sync status mask If set, allow SYSREF sync status signal to generate an alarm signal

Reserved

Product ID Registers (Register 0x0078 to 0x007A)

Table 37. Product ID Registers

Address

Bits

Bit Name

Settings

Description

Access

0x0078 [7:0] Product ID Value[7:0] (LSB) 24-bit product ID value low R

0x0079

[7:0]

Product ID Value[15:8] (Mid)

24-bit product ID value mid

0x007A [7:0] Product ID Value[23:16] (MSB) 24-bit product ID value high R

Alarm Readback Status Registers (Register 0x007B to 0x007F)

Table 38. Alarm Readback Status Registers

Address Bits Bit Name Settings Description Access

0x007B [7:1] Reserved Reserved. R

0 Alarm signal Readback alarm status from SPI.

0x007D [7:5] Reserved Reserved. R

4 Sync request status Unsynchronized.

3 Reserved Reserved.

2 Clock outputs phases

status

SYSREF alarm.

0 SYSREF of the HMC7043 is not valid; that is, the phase output is not stable.

1 SYSREF of the HMC7043 is valid; that is, the phase output is stable.

1 SYSREF sync status SYSREF SYNC status alarm.

0 The HMC7043 has been synchronized with an external sync pulse or a

sync request from the SPI.

1 The HMC7043 never synchronized with an external sync pulse or a sync

request from the SPI.

0 Reserved 1 Reserved.

0x007F [7:0] Reserved Reserved. R

HMC7043 Data Sheet

Rev. B | Page 38 of 43

SYSREF Status Register (Register 0x0091)

Table 39. SYSREF Status

Address

Bits

Bit Name

Settings

Description

Access

0x0091 [7:5] Reserved Reserved. R

4 Channel outputs

FSM busy

One of clock outputs FSM requested clock, and it is running.

[3:0] SYSREF FSM

State[3:0]

Indicates the current step of the SYSREF reseed process. Note that the three

different progressions are caused by different trigger events (reseed, pulse

generator, reserved).

0000

Reset.

0010

Done.

0100 Get ready.

0101 Get ready.

0110 Get ready.

1010 Running (pulse generator).

1011 Start.

1100 Power up.

1101 Power up.

1110 Power up.

1111 Clear reset.

Bias Settings (Register 0x0096 to Register 0x00B8)

For optimum performance of the chip, Register 0x0098 to Register 0x00B8 must be programmed to a different value than their default value.

Table 40. Reserved Registers

Address Bits Bit Name Settings Description Access

0x0098 [7:0] Reserved Reserved RW

0x0099

[7:0]

Reserved

0x009D [7:0] Reserved Reserved RW

0x009E [7:0] Reserved Reserved RW

0x009F [7:0] Reserved Clock output driver low power setting (set to 0x4D instead of default value) RW

0x00A0 [7:0] Reserved Clock output driver high power setting (set to 0xDF instead of default value) RW

0x00A2 [7:0] Reserved Reserved RW

0x00A3 [7:0] Reserved Reserved RW

0x00A4 [7:0] Reserved Reserved RW

0x00AD [7:0] Reserved Reserved RW

0x00B5 [7:0] Reserved Reserved RW

0x00B6 [7:0] Reserved Reserved RW

0x00B7 [7:0] Reserved Reserved RW

0x00B8 [7:0] Reserved Reserved RW

Data Sheet HMC7043

Rev. B | Page 39 of 43

Clock Distribution (Register 0x00C8 to Register 0x0152)

The bit descriptions in Table 41 apply to all 14 channels.

Table 41. Channel 0 to Channel 13 Control

Address Bits Bit Name Settings1 Description Access

0x00C8, 0x00D2, 0x00DC,

0x00E6, 0x00F0, 0x00FA,

0x0104, 0x010E, 0x0118,

0x0122, 0x012C, 0x0136,

0x0140, 0x014A

7 High performance

mode

High performance mode. Adjusts the divider and buffer

bias to improve swing/phase noise at the expense of

power.

6 SYNC enable Susceptible to SYNC event. The channel can process a

SYNC event to reset the phase.

5 Slip enable Susceptible to slip event. The channel can process a slip

request from SPI or GPI. Note that if slip enable is true,

but multislip is off, a channel slips by 1 clock input cycle

on an explicit slip request broadcast from the SPI/GPI.

Reserved

Reserved.

[3:2] Start-Up

Mode[1:0]

Configures the channel to normal mode with

asynchronous startup, or to a pulse generator mode with

dynamic start-up. Note that this must be set to

asynchronous mode if the channel is unused.

00 Asynchronous.

01 Reserved.

10 Reserved.

11 Dynamic.

1 Multislip enable Allow multislip operation (default = 0 for SYSREF, 1 for

DCLK).

Do not engage automatic multislip on channel startup.

1 Multislip events after SYNC or pulse generator request, if

the slip enable bit = 1.

Channel enable

Channel enable. If this bit is 0, channel is disabled.

0x00C9, 0x00D3, 0x00DD,

0x00E7, 0x00F1, 0x00FB,

0x0105, 0x010F, 0x0119,

0x0123, 0x012D, 0x0137,

0x0141, 0x014B

[7:0] 12-Bit Channel

Divider[7:0] (LSB)

12-bit channel divider setpoint LSB. The divider supports

even divide ratios from 2 to 4094. The supported odd

divide ratios are 1, 3, and 5. All even and odd divide ratios

have 50.0% duty cycle.

0x00CA, 0x00D4, 0x00DE,

0x00E8, 0x00F2, 0x00FC,

0x0106, 0x0110, 0x011A,

0x0124, 0x012E, 0x0138,

0x0142, 0x014C

[7:4] Reserved Reserved. RW

[3:0] 12-Bit Channel

Divider[11:8]

(MSB)

12-bit channel divider setpoint MSB.

0x00CB, 0x00D5, 0x00DF,

0x00E9, 0x00F3, 0x00FD,

0x0107, 0x0111, 0x011B,

0x0125, 0x012F, 0x0139,

0x0143, 0x014D

[7:5] Reserved Reserved. RW

[4:0] Fine Analog

Delay[4:0]

24 fine delay steps. Step size = 25 ps. Values bigger than

23 has no effect on analog delay.

0x00CC, 0x00D6, 0x00E0,

0x00EA, 0x00F4, 0x00FE,

0x0108, 0x0112, 0x011C,

0x0126, 0x0130, 0x013A,

0x0144, 0x014E

[7:5] Reserved Reserved. RW

[4:0] Coarse Digital

Delay[4:0]

17 coarse delay steps. Step size = ½ input clock cycle. This

flip flop (FF)-based digital delay does not increase noise

level at the expense of power. Values bigger than 17 have

no effect on coarse delay.

0x00CD, 0x00D7, 0x00E1,

0x00EB, 0x00F5, 0x00FF,

0x0109, 0x0113, 0x011D,

0x0127, 0x0131, 0x013B,

0x0145, 0x014F

[7:0] 12-Bit Multislip

Digital Delay[7:0]

(LSB)

12-bit multislip digital delay amount LSB. Step size =

(delay amount: MSB + LSB) × input clock cycles. If

multislip enable bit = 1, any slip events (caused by GPI,

SPI, SYNC, or pulse generator events) repeat the number

of times set by 12-Bit Multislip Digital Delay[11:0] to

adjust the phase by step size.

HMC7043 Data Sheet

Rev. B | Page 40 of 43

Address Bits Bit Name Settings1 Description Access

0x00CE, 0x00D8, 0x00E2,

0x00EC, 0x00F6, 0x0100,

0x010A, 0x0114, 0x011E,

0x0128, 0x0132, 0x013C,

0x0146, 0x0150

[7:4] Reserved Reserved. RW

[3:0]

12-Bit Multislip

Digital Delay[11:8]

(MSB)

12-bit multislip digital delay amount MSB.

0x00CF, 0x00D9, 0x00E3,

0x00ED, 0x00F7, 0x0101,

0x010B, 0x0115, 0x011F,

0x0129, 0x0133, 0x013D,

0x0147, 0x0151

[7:2] Reserved Reserved. RW

[1:0] Output Mux

Selection[1:0]

Channel output mux selection.

Channel divider output.

01 Analog delay output.

10 Other channel of the clock group pair.

11 Input clock (fundamental). Fundamental can also be

generated with 12-bit channel divider ratio = 1.

0x00D0, 0x00DA, 0x00E4,

0x00EE, 0x00F8, 0x0102,

0x010C, 0x0116, 0x0120,

0x012A, 0x0134, 0x013E,

0x0148, 0x0152

[7:6] Idle at Zero[1:0] Idle at Logic 0 selection (pulse generator mode only).

Force to Logic 0 or VCM.

00 Normal mode (selection for DCLK).

Reserved.

10 Force to Logic 0.

11 Force outputs to float, goes naturally to VCM.

5 Dynamic driver

enable

Dynamic driver enable (pulse generator mode only).

0 Driver is enabled/disabled with channel enable bit.

1 Driver is dynamically disabled with pulse generator events.

[4:3]

Driver Mode[1:0]

Output driver mode selection.

00 CML mode.

01 LVPECL mode.

10 LVDS mode.

11 CMOS mode.

2 Reserved Reserved.

[1:0] Driver

Impedance[1:0]

Output driver impedance selection for CML mode.

00 Internal resistor disable.

Internal 100 Ω resistor enable per output pin.

10 Reserved.

11 Internal 50 Ω resistor enable per output pin.

1 X means don’t care.

Data Sheet HMC7043

Rev. B | Page 41 of 43

APPLICATIONS INFORMATION

EVALUATION PCB AND SCHEMATIC

For the circuit board in this application, use RF circuit design

techniques. Ensure that signal lines have 50 Ω impedance.

Connect the package ground leads and exposed paddle directly

to the ground plane similar to that shown in Figure 32 and

Figure 33. Use a sufficient number of via holes to connect the

top and bottom ground planes. The evaluation circuit board is

available from Analog Devices, Inc., upon request.

The typical Pb-free reflow solder profile shown in Figure 31 is

based on JEDEC J-STD-20C.

13114-031

TEMPERATURE (°C)

217°C

RAMP UP

3°C/SECOND MAX

RAMP DOWN

6°C/SECOND MAX

TIME (Second)

60 TO 150

SECONDS

60 TO 180

SECONDS 20 TO 40

SECONDS

480 SECO NDS M AX

260 – 5/0°C

150°C TO 200°C

Figure 31. Pb-Free Reflow Solder Profile

13114-029

Figure 32. Evaluation PCB Layout, Top Side

HMC7043 Data Sheet

Rev. B | Page 42 of 43

13114-030

Figure 33. Evaluation PCB Layout, Bottom Side

Data Sheet HMC7043

Rev. B | Page 43 of 43

OUTLINE DIMENSIONS

11-20-2015-B

0.50

BSC

BOTTOM VIEWTOP VIEW

PIN 1

INDICATOR

EXPOSED

PAD

PIN 1

INDICATOR

SEATING

PLANE

0.05 MAX

0.02 NO M

0.20 REF

5.50 REF

COPLANARITY

0.08

0.31

0.25

0.19

7.10

7.00 SQ

6.90

0.90

0.85

0.80 F OR PROPER CONNECT ION OF

THE EXPOSED PAD, REFER TO

THE P IN CO NFIGURATIO N AND

FUNCT IO N DE S CRIPT IONS

SECTION OF THIS DATA SHEET.

0.45

0.40

0.35

0.20 MIN

5.66

5.60 SQ

5.54

13 12

PKG-000000

Figure 34. 48-Lead Lead Frame Chip Scale Package [LFCSP]

7 mm × 7 mm Body and 0.85 mm Package Height

(HCP-48-1)

Dimensions shown in millimeters

12-10-2015-A

NOTES:

10 SPROCKET HOLE PITCH CUMUL ATIVE TOLERANCE

± 0.20

2. CAMBER I N COM P LIANCE W ITH EIA 481

3. MAT ERIAL: CO NDUCT IVE BLACK PO LYSTYRENE

4. MEASURED ON A PLANE 0.30 mm ABO VE T HE BOTTOM OF

THE PO CKET

5. MEASURED FROM A PLANE ON THE INSIDE BO TTOM OF

THE PO CKET TO THE TOP SURFACE OF THE CARRIER

6. POCKET POSITION RELATIVE TO SPROCKET HOLE MEASURED

AS TRUE PO S ITI ON OF POCKET, NO T P OCKET HOLE

NOT E 4

NOT E 5

NOT E 6 NOT E 1

NOT E 6

DETAI L A

16.30

16.00

15.70

DIRECTION OF FEED

7.35

7.25

7.15

7.35

7.25

7.15

12.10

12.00

11.90

4.10

4.00

3.90

7.60

7.50

7.40

2.10

2.00

1.90

1.85

1.75

1.65

1.20

1.10

1.00

Ø 1. 5 ~ 1.6

Ø 1.5 MIN

TOP VIEW

SECT IO N A- A

R 0.25

0.25

0.35

0.30

0.25

Figure 35. LFCSP Tape and Reel Outline Dimensions

Dimensions shown in millimeters

ORDERING GUIDE

Model1 Temperature Range Lead Finish MSL Rating2 Package Description Package Option Branding3

HMC7043LP7FE −40oC to +85°C NiPdAu MSL-3 48-Lead Lead Frame Chip

Scale Package [LFCSP]

HCP-48-1

XXXX

7043

HMC7043LP7FETR −40oC to +85°C NiPdAu MSL-3 48-Lead Lead Frame Chip

Scale Package [LFCSP]

HCP-48-1

XXXX

7043

EK1HMC7043LP7F −40°C to +85°C Evaluation Kit

1 E = RoHS Compliant Part.

2 The maximum peak reflow temperature is 260°C for the HMC7043LP7FE.

3 Four-digit lot number represented by XXXX.

registered trademarks are the property of their respective owners.

D13114-0-7/16(B)