GS3490 Datasheet, PDF (1/22 Pages) Semtech Corporation – Configurable Adaptive Cable Equalizer/Cable Driver

Gennum Products
GS3490
Configurable Adaptive Cable
Equalizer/Cable Driver
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:
Š 206mW typical power consumption in EQ mode
Š 190mW typical power consumption in CD mode
• Temperature range: -40°C to +85°C
• 32-pin 5mm x 5mm QFN package
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:
Š 140m - 3G
Š 260m - HD
Š 500m - SD
• Carrier detect with adjustable squelch threshold
• Optional automatic power-down on loss of input
signal
SDI/SDO
DDI
CD
DDI
DDO
EQ
DDO
CD
Cable Driver Features
• 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
Rev. 1
April 2014
www.semtech.com
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