The LMH0394 3-Gbps HD/SD SDI Low Power Extended Reach Adaptive Cable Equalizer is
designed to equalize data transmitted over cable (or any media with similar dispersive loss
characteristics). The equalizer operates over a wide range of data rates from 125 Mbps to 2.97 Gbps
and supports ST 424, ST 292, ST 344, ST 259, and DVB-ASI standards.
The LMH0394 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 output
driver offers programmable de-emphasis for up to 40” of FR4 trace losses. The LMH0394 includes
power management to further reduce power consumption when no input signal is present.
The LMH0394 supports two modes of operation. In pin mode, the LMH0394 operates with
control pins to set its operating state, and is footprint compatible with the LMH0384, LMH0344, and
legacy SDI equalizers. In SPI mode, an optional SPI serial interface can be used to access and
configure multiple LMH0394 devices in a daisy-chain configuration. This allows users to program the
output common-mode voltage and swing, output de-emphasis level, input launch amplitude, and power
management settings. Users may also access a cable length indicator and all pin mode
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