DS10BR150TSDX - Texas Instruments High-Performance Analog

April 2007

DS10BR150

1.0 Gbps LVDS Buffer / Repeater

General Description

The DS10BR150 is a single channel 1.0 Gbps LVDS buffer

optimized for high-speed signal transmission over lossy FR-4

printed circuit board backplanes and balanced cables. Fully

differential signal paths ensure exceptional signal integrity

and noise immunity.

Wide input common mode range allows the receiver to accept

signals with LVDS, CML and LVPECL levels; the output levels

are LVDS. A very small package footprint requires a minimal

space on the board while the flow-through pinout allows easy

board layout. The differential inputs and outputs are internally

terminated with a 100Ω resistor to lower device input and out-

put return losses, reduce component count and further mini-

mize board space.

Features

■DC - 1.0 Gbps low jitter, high noise immunity, low power

operation

■On-chip 100Ω input and output termination minimizes

insertion and return losses, reduces component count and

minimizes board space

■7 kV ESD on LVDS I/O pins protects adjoining

components

■Small 3 mm x 3 mm 8-LLP space saving package

Applications

■Clock and data buffering

■OC-12 / STM-4

■Fibre Channel (1GFC)

■FireWire 800

Typical Application

30001710

DS10BR150 1.0 Gbps LVDS Buffer / Repeater

Block Diagram

30001701

Pin Diagram

30001702

Pin Descriptions

Pin Name Pin Name Pin Type Pin Description

NC 1 NA "NO CONNECT" pin.

IN+ 2 Input Non-inverting LVDS input pin.

IN- 3 Input Inverting LVDS input pin.

NC 4 NA "NO CONNECT" pin.

NC 5 NA "NO CONNECT" pin.

OUT- 6 Output Inverting LVDS output pin.

OUT+ 7 Output Non-inverting LVDS Output pin.

VCC 8 Power Power supply pin.

GND DAP Power Ground pad (DAP - die attach pad)

Ordering Code

NSID Function

DS10BR150TSD Buffer / Repeater

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DS10BR150

Absolute Maximum Ratings (Note 4)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Supply Voltage (VCC)−0.3V to +4V

LVDS Input Voltage (IN+, IN−) −0.3V to +4V

LVDS Differential Input Voltage ((IN+) - (IN−)) 0V to 1V

LVDS Output Voltage (OUT+, OUT−) −0.3V to +4V

LVDS Differential Output Voltage ((OUT+) - (OUT−)) 0V to 1V

LVDS Output Short Circuit Current

Duration 5 ms

Junction Temperature +150°C

Storage Temperature Range −65°C to +150°C

Lead Temperature Range

Soldering (4 sec.) +260°C

Maximum Package Power Dissipation at 25°C

SDA Package 2.08W

Derate SDA Package 16.7 mW/°C above +25°C

Package Thermal Resistance

θJA +60.0°C/W

θJC +12.3°C/W

ESD Susceptibility

HBM ≥7 kV

MM ≥250V

CDM ≥1250V

Note 1: Human Body Model, applicable std. JESD22-A114C

Note 2: Machine Model, applicable std. JESD22-A115-A

Note 3: Field Induced Charge Device Model, applicable std.

JESD22-C101-C

Recommended Operating

Conditions

Min Typ Max Units

Supply Voltage (VCC) 3.0 3.3 3.6 V

Receiver Differential Input

Voltage (VID)

0 1 V

Operating Free Air

Temperature (TA)

−40 +25 +85 °C

DC Electrical Characteristics

Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 6, 7)

Symbol Parameter Conditions Min Typ Max Units

LVDS OUTPUT DC SPECIFICATIONS (OUT+, OUT-)

VOD Differential Output Voltage

RL = 100Ω

250 350 450 mV

ΔVOD Change in Magnitude of VOD for Complimentary

Output States -35 35 mV

VOS Offset Voltage

RL = 100Ω

1.05 1.2 1.375 V

ΔVOS Change in Magnitude of VOS for Complimentary

Output States -35 35 mV

IOS Output Short Circuit Current (Note 8) OUT to GND -30 -50 mA

OUT to VCC 7.5 50 mA

COUT Output Capacitance Any LVDS Output Pin to GND 1.2 pF

ROUT Output Termination Resistor Between OUT+ and OUT- Pins 100 Ω

LVDS INPUT DC SPECIFICATIONS (IN+, IN-)

VID Input Differential Voltage 0 1 V

VTH Differential Input High Threshold VCM = +0.05V or VCC-0.05V 0 +100 mV

VTL Differential Input Low Threshold −100 0 mV

VCMR Common Mode Voltage Range VID = 100 mV 0.05 VCC -

0.05

IIN Input Current VIN = 3.6V or 0V

VCC = 3.6V or 0V

±1 ±10 μA

CIN Input Capacitance 1.7 pF

RIN Input Termination Resistor Between IN+ and IN- Pins 100 Ω

SUPPLY CURRENT

ICCD Total Supply Current 16 21 mA

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DS10BR150

AC Electrical Characteristics (Note 9)

Over recommended operating supply and temperature ranges unless otherwise specified. (Notes 5, 7)

Symbol Parameter Conditions Min Typ Max Units

LVDS OUTPUT AC SPECIFICATIONS (OUT+, OUT-)

tPHLD2 Differential Propagation Delay High to Low RL = 100Ω 380 600 ps

tPLHD2 Differential Propagation Delay Low to High 410 600 ps

tSKD1 Pulse Skew |tPLHD − tPHLD| (Note 10) 30 150 ps

tSKD2 Part to Part Skew (Note 11) 45 160 ps

tLHT Rise Time RL = 100Ω 165 400 ps

tHLT Fall Time 155 400 ps

JITTER PERFORMANCE (Figure 5)

tDJ Deterministic Jitter (Peak-to-Peak Value )

(Note 13)

VID = 350 mV

VCM = 1.2V

K28.5 (NRZ)

622 Mbps 12 39 ps

1.06 Gbps 15 42 ps

tRJ Random Jitter (RMS Value)

(Note 12)

VID = 350 mV

VCM = 1.2V

Clock (NRZ)

311 MHz 0.6 1.3 ps

503 MHz 0.6 1.1 ps

tTJ Total Jitter (Peak to Peak Value)

(Note 14)

VID = 350 mV

VCM = 1.2V

PRBS-23 (NRZ)

622 Mbps 0.02 0.04 UIP-P

1.06 Gbps 0.02 0.05 UIP-P

Note 4: “Absolute Maximum Ratings” indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability

and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond those indicated in

the Recommended Operating Conditions is not implied. The Recommended Operating Conditions indicate conditions at which the device is functional and the

device should not be operated beyond such conditions.

Note 5: The Electrical Characteristics tables list guaranteed specifications under the listed Recommended Operating Conditions except as otherwise modified

or specified by the Electrical Characteristics Conditions and/or Notes. Typical specifications are estimations only and are not guaranteed.

Note 6: Current into device pins is defined as positive. Current out of device pins is defined as negative. All voltages are referenced to ground except VOD and

ΔVOD.

Note 7: Typical values represent most likely parametric norms for VCC = +3.3V and TA = +25°C, and at the Recommended Operation Conditions at the time of

product characterization and are not guaranteed.

Note 8: Output short circuit current (IOS) is specified as magnitude only, minus sign indicates direction only.

Note 9: Specification is guaranteed by characterization and is not tested in production.

Note 10: tSKD1, |tPLHD − tPHLD|, is the magnitude difference in differential propagation delay time between the positive going edge and the negative going edge of

the same channel.

Note 11: tSKD2, Part to Part Skew, is defined as the difference between the minimum and maximum specified differential propagation delays. This specification

applies to devices at the same VCC and within 5°C of each other within the operating temperature range.

Note 12: Measured on a clock edge with a histogram and an acummulation of 1500 histogram hits. Input stimulus jitter is subtracted geometrically.

Note 13: Tested with a combination of the 1100000101 (K28.5+ character) and 0011111010 (K28.5- character) patterns. Input stimulus jitter is subtracted

algebraically.

Note 14: Measured on an eye diagram with a histogram and an acummulation of 3500 histogram hits. Input stimulus jitter is subtracted.

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DS10BR150

DC Test Circuits

30001720

FIGURE 1. Differential Driver DC Test Circuit

AC Test Circuits and Timing Diagrams

30001721

FIGURE 2. Differential Driver AC Test Circuit

30001722

FIGURE 3. Propagation Delay Timing Diagram

30001723

FIGURE 4. LVDS Output Transition Times

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DS10BR150

30001729

FIGURE 5. Jitter Measurements Test Circuit

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DS10BR150

Device Operation

INPUT INTERFACING

The DS10BR150 accepts differential signals and allows simple AC or DC coupling. With a wide common mode range, the

DS10BR150 can be DC-coupled with all common differential drivers (i.e. LVPECL, LVDS, CML). The following three figures illus-

trate typical DC-coupled interface to common differential drivers. Note that the DS10BR150 inputs are internally terminated with

a 100Ω resistor.

30001711

Typical LVDS Driver DC-Coupled Interface to DS10BR150 Input

30001712

Typical CML Driver DC-Coupled Interface to DS10BR150 Input

30001713

Typical LVPECL Driver DC-Coupled Interface to DS10BR150 Input

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DS10BR150

OUTPUT INTERFACING

The DS10BR150 outputs signals are compliant to the LVDS standard. It can be DC-coupled to most common differential receivers.

The following figure illustrates typical DC-coupled interface to common differential receivers and assumes that the receivers have

high impedance inputs. While most differential receivers have a common mode input range that can accomodate LVDS compliant

signals, it is recommended to check respective receiver's data sheet prior to implementing the suggested interface implementation.

30001714

Typical DS10BR150 Output DC-Coupled Interface to an LVDS, CML or LVPECL Receiver

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DS10BR150

Typical Performance

30001730

A 622 Mbps NRZ PRBS-7 Output Eye Diagram

V:100 mV / DIV, H:200 ps / DIV

30001732

Total Jitter as a Function of Input Amplitude

30001731

A 1062.5 Mbps NRZ PRBS-7 Output Eye Diagram

V:100 mV / DIV, H:150 ps / DIV

30001733

Total Jitter as a Function of Input Amplitude

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DS10BR150

Physical Dimensions inches (millimeters) unless otherwise noted

Order Number DS10BR150TSD

NS Package Number SDA08A

(See AN-1187 for PCB Design and Assembly Recommendations)

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DS10BR150

Notes

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DS10BR150

Notes

DS10BR150 1.0 Gbps LVDS Buffer / Repeater

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