LMH0324
ZHCSIC8B –APRIL 2016–REVISED JUNE 2018
www.ti.com.cn
7 Detailed Description
7.1 Overview
The LMH0324 is an adaptive cable equalizer designed to equalize serial digital video data transmitted over long
distance of coaxial cable, such as Belden 1694A. It is designed with high gain equalization boost implemented
with low power and low noise circuitry, supporting 3G/HD/SD SDI video transport over high loss coaxial cable.
It is designed to support common video data rates from 125 Mbps to 2.97 Gbps, compatible to SMPTE video
standards ST-424, ST-344, ST-292, ST-259, and DVB-ASI.
The LMH0324 automatically selects the correct level of equalization boost based on the signal quality of the input
signal. It offers two output drivers that support fan-out buffering. Programmable de-emphasis is available to
reduce the inter-symbol interference jitter caused by the printed circuit board traces connecting the drivers to
their downstream receivers.
7.2 Functional Block Diagram
Low Power
Adaptive Cable Equalizer
VOD_DE
2
100 Ω
DRIVER
EQ Bypass
OUT0±
OUT1±
2
SE 75 Ω
Term and
RL network
VOD_DE
Adaptive
Cable EQ
IN0±
2
100 Ω
DRIVER
Carrier
OUT_MUX
Detector
Control
LOS
Power
Management
Serial
Interface
LDO
Control Logic
12
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