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Proprietary & Confidential

GS3140

Product Brief

Rev.0

PDS-060941

January 2015

Gennum Products

GS3140

Multi-Rate Adaptive 3G

SDI Equalizer

www.semtech.com

Key Features

•

Multi-standard operation at rates between 1Mb/s and

2.97Gb/s

•

SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259

compliant

•

AES10 (MADI) compatible

•

Industry leading cable reach, with automatic cable

equalization for different lengths of cable

•

Performance optimized for 125Mb/s, 270Mb/s,

1.485Gb/s, and 2.97Gb/s. Typical equalized length of

Belden 1694A cable up to:

200m at 2.97Gb/s

280m at 1.485Gb/s

500m at 270Mb/s

•

1.8V core power supply

•

Typical power consumption of 84mW when

•

Ultra-low power mode for shorter cable reach

applications

•

•

Auto/Manual bypass (useful for low data rates with

slow rise/fall times)

•

Robust, noise-immune signal detection with squelch

threshold adjustment

•

Auto/Manual control of SLEEP/MUTE/DISABLE OUTPUT

modes

•

Data Rate detection and indication

<MADI, MADI, SD, HD, 3G differentiation

•

Digital cable length indication (CLI)

•

Differential output supports DC-coupling from

1.2V to 2.5V CML logic and AC-coupling for other logic

families

•

Programmable/Rate-dependent output de-emphasis

level and delay

•

Host interface for status and control

•

3kV HBM ESD protection on all pins

•

Wide operating temperature range of -40ºC to +85ºC

•

Small footprint QFN–COL package

(16-pin, 4mm x 4mm)

•

Pb-free and RoHS compliant

•

Pin-compatible with the GS6140

Applications

•

SMPTE ST 424, SMPTE ST 292, SMPTE ST 259 and AES10

coaxial cable serial digital interfaces

Description

The GS3140 is a high-speed BiCMOS device designed to

equalize and restore signals received over cable.

The device is designed to support SMPTE ST 424, SMPTE ST

292, SMPTE ST 259 and AES10 (MADI), and it is optimized

for performance at 125Mb/s, 270Mb/s, 1.485Gb/s, and

2.97Gb/s.

The device supports MADI serial signals at 125Mb/s with

The GS3140 features DC restoration to compensate for the

DC content of SMPTE pathological signals.

Loss of Signal (LOS) is detected when the input carrier is lost

or signal amplitude falls below a programmable threshold.

This is further processed by a filter programmable up to

1.6s before LOS status is asserted. The device can be

programmed to automatically sleep/mute/disable the

output on loss of signal.

An interrupt pin (INT) indicates LOS by default, and can be

programmed to signal various other statuses.

When the BYPASS control bit is set, the equalizing and DC

restore stages are disengaged. This is useful for signals

launched at the source with low data rates and/or slow rise

and fall times.