LMH0395,LMH0395QX,LMH0395SQ,LMH0395SQE

Part No.:
LMH0395,LMH0395QX,LMH0395SQ,LMH0395SQE
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Description:
3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable Equalizer
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370 K
Page:
21 Pages
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TI [ TEXAS INSTRUMENTS ]
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PCB Datasheet:1PCB Datasheet:1PCB Datasheet:1
LMH0395 3G HD/SD SDI Dual Output Low Power Extended Reach Adaptive Cable Equalizer
April 4, 2012
LMH0395
3G HD/SD SDI Dual Output Low Power Extended Reach
Adaptive Cable Equalizer
General Description
The LMH0395 3 Gbps HD/SD SDI Dual Output Low Power
Extended Reach Adaptive Cable Equalizer is designed to
equalize data transmitted over cable (or any media with sim-
ilar dispersive loss characteristics). The equalizer operates
over a wide range of data rates from 125 Mbps to 2.97 Gbps
and supports SMPTE 424M, SMPTE 292M, SMPTE 344M,
SMPTE 259M, and DVB-ASI standards.
The LMH0395 provides extended cable reach with improved
immunity to crosstalk and ultra low power consumption. The
equalizer includes active sensing circuitry that ensures robust
performance and enhanced immunity to variations in the input
signal launch amplitude. The LMH0395 offers power man-
agement to further reduce power consumption when no input
signal is present.
The LMH0395 has two differential serial data outputs, in-
creasing flexibility and eliminating the need for a fanout buffer
on the output in many applications. The outputs may be in-
dependently enabled and controlled. The output drivers offer
programmable de-emphasis for up to 40” of FR4 trace losses.
The LMH0395 supports two modes of operation. In pin mode,
the LMH0395 operates with control pins to set its operating
state. In SPI mode, an optional SPI serial interface can be
used to access and configure multiple LMH0395 devices in a
daisy-chain configuration. This allows programming the out-
put common mode voltage and swing, output de-emphasis
level, input launch amplitude, and power management set-
tings, as well as access to a cable length indicator and all pin
mode features.
Features
SMPTE 424M, SMPTE 292M, SMPTE 344M, SMPTE
259M, and DVB-ASI compliant
Equalized cable lengths (Belden 1694A): 200m at 2.97
Gbps, 220m at 1.485 Gbps, and 400m at 270 Mbps
Ultra low power consumption: 140 mW (dual outputs),
115 mW (single output)
Dual differential outputs; second output can be
independently powered down
Power save mode with auto sleep control (17 mW typical
power consumption in power save mode)
Designed for crosstalk immunity
Output de-emphasis to compensate for FR4 board trace
losses
Digital and analog programmable MUTE
REF
threshold
Optional SPI register access
Input data rates: 125 Mbps to 2.97 Gbps
Internally terminated 100Ω LVDS outputs with
programmable output common mode voltage and swing
Programmable launch amplitude optimization
Cable length indicator
Single 2.5V supply operation
24-pin LLP package
Industrial temperature range: −40°C to +85°C
Applications
SMPTE 424M, SMPTE 292M, SMPTE 344M, and SMPTE
259M serial digital interfaces
Broadcast Video routers, switchers, and distribution
amplifiers
Typical Application (Pin Mode)
30115701
© 2012 Texas Instruments Incorporated
301157 SNLS323K
www.ti.com