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GS3490

Description
Configurable Adaptive Cable Equalizer/Cable Driver
File Size971KB,22 Pages
ManufacturerSEMTECH
Websitehttp://www.semtech.com
Download Datasheet View All

GS3490 Overview

Configurable Adaptive Cable Equalizer/Cable Driver

GS3490
Configurable Adaptive Cable
Equalizer/Cable Driver
Gennum Products
Key Features
Connection to a single BNC connector as an adaptive
cable equalizer or cable driver
Performance and cable reach optimized for
SMPTE ST 424, SMPTE ST 292, and SMPTE ST 259 data
rates
Multi-rate operation from 125Mb/s to 2.97Gb/s in
Equalizer Mode and 270Mb/s to 2.97Gb/s in
Cable Driver Mode
Supports DVB-ASI at 270Mb/s
Integrated 100Ω, differential digital data input/output
termination
Low power operation from a single 3.3V supply:
206mW typical power consumption in EQ mode
190mW typical power consumption in CD mode
Temperature range: -40°C to +85°C
32-pin 5mm x 5mm QFN package
CD_ENABLE
CD_SD_EN
RSET
Description
The GS3490 features integrated adaptive cable equalizer
and cable driver functionality. The GS3490 can be
field-configured as a SMPTE compliant cable equalizer or a
SMPTE compliant cable driver.
The GS3490 is optimized for applications with limited I/O
space. With its configurable EQ and cable driver
functionality, the GS3490 can be utilized as a single-device
solution in applications where the interface connector can
be configured as either an input or output.
The GS3490's cable equalizer is optimized for operation at
2.97Gb/s, 1.485Gb/s and 270Mb/s while providing typical
cable reach of 140m at 2.97Gb/s, 260m at 1.485Gb/s and
500m at 270Mb/s.
In cable driver mode, the dual slew rate capability provides
compatibility to SMPTE ST 424, SMPTE ST 292 and
SMPTE ST 259 interfaces.
Cable Equalizer Features
Integrated cable equalizer:
140m - 3G
260m - HD
SDI/SDO
CD
DDI
DDI
500m - SD
Carrier detect with adjustable squelch threshold
Optional automatic power-down on loss of input
signal
EQ
DDO
DDO
CD
Cable Driver Features
EQ_DISABLE
Selectable output slew rate cable driver for compliance
with SMPTE ST 424, SMPTE ST 292, and SMPTE ST 259
standards
Applications
SMPTE ST 424, SMPTE ST 292 and SMPTE ST 259
interfaces requiring switching between cable
equalizing or cable driving functionality
GS3490 Block Diagram
GS3490
Final Data Sheet
GENDOC-058568
www.semtech.com
Rev. 1
April 2014
EQ_GAIN_SEL
EQ_BYPASS
EQ_OP_CTRL
EQ_SQ_ADJ
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