1 Features

1• ST 424, ST 292, ST 344, ST 259, and DVB-ASI

Compliant(1)

• Equalized Cable Lengths (Belden 1694A): 200

Meters at 2.97 Gbps, 220 Meters at 1.485 Gbps,

and 400 Meters at 270 Mbps

• Ultra Low Power Consumption: 115 mW (Normal DVBOperation)

• 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 MUTEREF

Threshold

• Optional SPI Register Access

• Input Data Rates: 125 Mbps to 2.97 Gbps

• Internally Terminated 100-Ω LVDS Outputs With

Programmable Output Common-Mode Voltage

and Swing

• Programmable Launch Amplitude Optimization

• Cable Length Indicator

• Single 2.5-V Supply Operation

• 16-pin WQFN Package

• Industrial Temperature Range: −40°C to +85°C

• Footprint Compatible with the LMH0384 and also

the LMH0344, LMH0044, and LMH0074 in Pin

Mode

2 Applications

• ST 424, ST 292, ST 344, and ST 259 Serial

Digital Interfaces(1)

• Broadcast Video Routers, Switchers, and

Distribution Amplifiers

3 Description

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 DVBOperation)

ASI standards(1).

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 features.