LMH0344 Datasheet, PDF (1/8 Pages) Texas Instruments – 3 Gbps HD/SD SDI Adaptive Cable Equalizer

PRELIMINARY
April 2007
LMH0344
3Gbps HD/SD SDI Adaptive Cable Equalizer
General Description
The LMH0344 3Gbps HD/SD SDI Adaptive Cable Equalizer
is designed to equalize data transmitted over cable (or any
media with similar dispersive loss characteristics). The equal-
izer operates over a wide range of data rates from 143 Mbps
to 2.97 Gbps and supports SMPTE 424M, SMPTE 292M,
SMPTE 344M, and SMPTE 259M.
The LMH0344 implements DC restoration to correctly handle
pathological data conditions. The equalizer may be driven in
either a single ended or differential configuration.
Additional features include separate carrier detect and output
mute pins which may be tied together to mute the output when
no signal is present. A programmable mute reference is pro-
vided to mute the output at a selectable level of signal degra-
dation.
Features
■ ^{SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE}
259M compliant
■ ^{Supports DVB-ASI at 270 Mbps}
■ ^{High data rates: 143 Mbps to 2.97 Gbps}
■ ^{Equalizes up to 120 meters of Belden 1694A at 2.97 Gbps,}
up to 140 meters of Belden 1694A at 1.485 Gbps, or up to
350 meters of Belden 1694A at 270 Mbps
■ ^{Equalizes 0-100m of Belden 1694A at 2.97 Gbps with}
0.3 UI maximum output jitter
■ ^{Manual bypass and output mute with a programmable}
threshold
■ ^{Single-ended or differential input}
■ 50Ω differential outputs
■ ^{Single 3.3V supply operation}
■ ^{280mW typical power consumption with 3.3V supply}
■ ^{Footprint compatible with the LMH0044}
■ ^{Replaces the Gennum GS2974 or GS2974A}
Applications
■ ^{SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE}
259M serial digital interfaces
■ ^{Serial digital data equalization and reception}
■ ^{Data recovery equalization}
Typical Application
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