HRF-AT4611
31.5 dB, DC - 4GHz, 6 Bit Serial Digital Attenuator
The Honeywell HRF-AT4611 is a 6-bit digital attenuator that is ideal for use in
broadband communication system applications that require accuracy, speed
and low power consumption. The HRF-AT4611 is manufactured with
Honeywell's patented Silicon On Insulator (SOI) CMOS manufacturing
technology, which provides the performance of GaAs with the economy and
integration capabilities of conventional CMOS. These attenuators are DC
coupled to improve lower operating frequency, frequency response and
reduce the number of DC bias points required.
FEATURES
• Very Low DC Power Consumption
• Attenuation In Steps From 0.5 dB To 31.5 dB
• Single Positive Power Supply Voltage
• Serial Data Interface
• 50 Ohm Impedance
• DC-coupled, bi-directional RF path
• Space Saving VQFN Surface Mount Packaging
• Lead-free, RoHS compliant and Green
RF ELECTRICAL SPECIFICATIO NS @ + 25oC
Results @ VDD = 5.0 +/- 10%, VSS = 0 unless otherwise stated, Z0 = 50 Ohm s
Contact Honeywell for relative perform ance at other supply configurations
HR
F
-
AT4611 in VQFN Packa
g
e
Parameter Test Condition Frequency Minimum Typical Maximum Units
Insertion Loss
1.0 GHz
2.5 GHz
3.0 GHz
4.0 GHz
2.5
3.0
3.6
5.5
2.9
3.5
3.9
5.8
dB
dB
dB
dB
1dB Compression VSS = 0V, Input Power
VSS = -3V, Input Power 2.0 GHz
2.0 GHz 24
29 dBm
dBm
Input IP3 VSS = 0V, Two-tone inputs, up to +5
dBm @ 0 dB attenuation 2.0 GHz 38 dBm
Input IP3 Vss = -3V, Two-tone inputs, up to +5
dBm @ 0 dBm attenuation 2.0 GHz >38 dBm
Return Loss Any Bit or Combination -11 -13 dB
Attenuation Accuracy
All attenuation states
All attenuation states
All attenuation states
All attenuation states
1.0 GHz
2.5 GHz
3.0 GHz
4.0 GHz
+/-(0.3 + 3.0% of programmed IL)
+/-(0.3 + 4.0% of programmed IL)
+/-(0.3 + 5.5% of programmed IL)
+/-(0.3 + 7.0% of programmed IL)
dB
dB
dB
dB
Trise, Tfall
Ton, Toff (Tpd) 10% To 90%
50% Cntl To 90% / 10%RF 10
15 nS
nS
T clock Period (Tprd) T high / T low = ½ minimum clock period 50 nS
T data set up (Tsup) Set up to rising edge of clock 5 nS
T data hold (Thld) Data hold after rising edge of clock 2 nS
T latch set up (Tlsup) Data set up to rising edge of OE 5 nS
HRF-AT4611
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FUNCTIONAL SCHEMATIC
DC ELECTRICAL SPECIFICATIO NS @ + 25°C
Parameter Minimum Typical Maximum Units
VDD 3.31 5.0 5.5 V
VSS -5.0 V
IDD <5.0 50 uA
CMOS Logic level (0) 0 0.8 V
CMOS Logic level (1) VDD – 0.8 VDD V
Input Leakage Current 10 uA
Note 1, the performance curves are for VDD = +5.0 +/- 10%
ABSOLUTE MAXIMUM RATINGS1
Parameter Absolute Maximum Units
Input Power + 35 dBm
VDD +6.0 V
VSS -5.5 V
ESD Voltage 2 400 V
Operating Temperature -40 To +85 OC
Storage Temperature -65 To +125 OC
Moisture Sensitivity Level Level 3 @ 260OC
Digital Inputs VDD+0.6 max to -0.6 min V
Note 1 - Operation of this device beyond any of these parameters may cau se p ermanent damage.
Note 2 - Although the HRF-AT4611 contains ESD protection circuitry on all digital inputs, precautions should be taken to
ensure that the Absolute Maximum Ratings are not exceeded.
Latch-Up: Unlike conventional CMOS digital attenuators, Honeywell’s HRF-AT4611 is imm une to latch-up.
RF In RF Out
CLK DATA OE
16dB 8dB 4dB 2dB 1dB .5dB
ES D , Regi sters, B uff er, Le ve l S h ift
HRF-AT4611
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PIN CONFIGURATIONS
Pin Function Pin Function
1 VDD 9 GROUND
2 GROUND 10 RF OUTPUT
3 RF INPUT 11 GROUND
4 GROUND 12 VSS
5 GROUND 13 GROUND
6 GROUND 14 OE
7 GROUND 15 CLK
8 GROUND 16 DATA
Note: Bottom ground plate must be grou nded for proper RF performance.
SERIAL DATA LOAD
Serial data is shifted into the register on the risi ng edge of clock, MSB first. The OE rising edge must occur prior to any
additional rising clock edg es. See the Electrical Spec Table for AC parameters.
TRUTH TABLE
S5 S4 S3 S2 S1 S0 Output
0
0
0
0
0
0
1
1
0
0
0
0
0
1
0
1
0
0
0
0
1
0
0
1
0
0
0
1
0
0
0
1
0
0
1
0
0
0
0
1
0
1
0
0
0
0
0
1
Reference Input
0.5 dB
1 dB
2 dB
4 dB
8 dB
16 dB
31.5 dB
Operation: Data on serial input D is clocked into internal registers on the low to high transition of the Clock signal (CK).
The register output is enabled when Output Enable (OE) is in the low state. "0" = CMOS Low, "1" = CMOS High.
HRF-AT4611
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PERFORMANCE CURVES
Insertion Loss
Typical AT4611 Reference Insertion Lo ss
-5.0
-4.5
-4.0
-3.5
-3.0
-2.5
-2.0
-1.5
-1.0
-0.5
0.0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25 3.50 3.75
Frequency (GHz)
Insertion Loss (dB)
- 40 C
+ 25 C
+ 85 C
3.3 V
Return Loss
Typical AT4611 Input Return Loss
-40.0
-35.0
-30.0
-25.0
-20.0
-15.0
-10.0
-5.0
0.0
0.00 0.50 1.00 1.50 2.00 2.50 3.00 3.50 4.00
Frequency (GHz)
Inp ut R e tu rn L o s s (d B)
Attn 1dB Attn 2 dB
Attn 3dB Attn 5d B
Attn 9dB Attn 17 dB
Attn 31dB
HRF-AT4611
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Step Accuracy
Typical AT4611 Step Accuracy
-1.0
-0.8
-0.6
-0.4
-0.2
0.0
0.2
0.4
0.6
0.8
1.0
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25
Frequency (GHz)
Step Accuracy (dB)
0.5 dB 1.0 dB
2.0 dB 4.0 dB
8.0 dB 16.0 dB
31.5 dB
16 dB
8 dB 31.5 dB
4 dB
2 dB
Relative Accuracy
Typical AT4611 Relative Accuracy
-2.0
-1.5
-1.0
-0.5
0.0
0.5
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00 2.25 2.50 2.75 3.00 3.25
Freque nc y (G Hz)
Relative Accuracy (dB)
0.5 dB 1.0 dB
2.0 dB 4.0 dB
8.0 dB 16.0 dB
31.5 dB
31.5 dB
16 dB
8 dB
4 dB
HRF-AT4611
6 www.honeywell.com/microwave
PACKAGE OUTLINE DRAWING
GREEN MATERIAL SET
The –GR attenuators have a Green mate rial set that can with stand a maximum soldering temperature of 260OC.
LEAD FINISH
The package leads are Nickel Palladium Gold (NiPdAu). The configuration being manufactured and delivere d today is
lead-free RoHS compliant. Compliant packages have half-etch lead frames and have date codes of 0300 or greater.
LEAD FREE QFN SURFACE MOUNT APPLICATION
Please see Application Note AN310 for assembly process recommendations. The maximum solderin g temperature of the
-GR is 260oC (-AU attenuators are 250 oC). Application Notes can be found at our website:
www.honeywell.com/microwave
CIRCUIT APPLICATION INFORMATION
These attenuators require a DC referen ce to ground. They may not operate properly when AC co upled on both the RF
input and output without a DC ground reference provided as part of the circuit. See Application Note AN311.
Notes
1. Pin 1 identifier can be a combination or a dot and/ or chamfer.
2. Dimensions are in millimeters.
HRF-AT4611
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EVALUATION CIRCUIT BOARD
Honeywell's evaluation board provides an easy to use method of evaluating the RF performance of our attenuator. Simply
connect power, DC and RF signals to be measuring attenuator performance in less than 10 minutes.
EVALUATION CIRCUIT BOARD LAYOUT DESIGN DETAILS
Item Description
PCB Impedance Matched Multi-Layer FR4
Attenuator HRF-AT4611 Digital Attenuator
Chip Capacitor Panasonic Model ECU-E1C103KBQ Capacitor, .01uf 0402 10% 16V
RF Connector Johnson Connectors Model 142-0701-801 SMA RF Coaxial Connector
DC Pin Mil-Max Model 800-10-064-10-001 Header Pins
ORDERING INFORMATION
Ordering Number Delivery Method Units Per Shipment
HRF-AT4611-GR-TR
HRF-AT4611-GR-T
HRF-AT4611-E
Tape & Reel
Tape
Evaluation Board
2500 Units per Reel
<2500
One Board Per Box
The new –GR attenuators will replace and are fully back-compatible with the –AU attenuators.
FIND OUT MORE
For more information on Honeywell’s Microwave Products visit us online at www.honeywell.com/microwave or contact
us at 800-323-8295 (763-954-2474 internationally).
Honeywell reserves the right to make changes to improve reliability, function or design. Honeywell does not assume any liability arising out of the
application or use of any product or circuit described herein; neither does it convey any license under its patent rights nor the rights of others.
Honeywell
12001 High wa y 55
Plymouth, MN 55441
Tel: 800-323-8295
www.honeywell.com/microwave
Form #4611W
September 2007
©2007 Hone
y
well International Inc.
HRF-AT4611 Evaluation Board
HRF-AT4611
Evaluation Board
Top View
HRF-AT4611
Honeywell
RF In RF Out
VDD VSS
Gnd
Gnd DataCLK OE
