1 Features

1• Supports ST 424(3G), ST 292(HD), and ST

259(SD)

• Compatible with DVB-ASI and AES10 (MADI)

• Adaptive Cable Equalizer

• Cable Reach (Belden 1694A):

– 200 m at 2.97 Gbps

– 280 m at 1.485 Gbps

– 600 m at 270 Mbps

• Low Power: 78 mW (typical)

• Power Save Mode: 15 mW

• On-chip Input Termination (75 Ω single-ended)

• Integrated Input Return Loss Network

• Dual 100-Ω Output Drivers With De-Emphasis

• Independent Output Power-Down Control

• Supports Signal Splitter Mode (–6 dB Launch

Amplitude)

• Cable Length Indicator

• Digital MUTEREF Threshold

• Powers from 2.5-V or 1.8-V Supply

• Configurable by Control Pins, SPI, or SMBus

Interface

• 4-mm × 4-mm 24-pin QFN Package

• Operating Temperature Range: –40°C to +85°C

2 Applications

• SMPTE Compatible Serial Digital Interface (SDI)

• Broadcast Video Routers, Switchers, and Monitors

• DVB-ASI and Distribution Amplifiers

• Digital Video Processing and Editing

3 Description

The LMH0324 is a low-power, dual-output, extended

reach adaptive cable equalizer. It is designed to

equalize SDI data transmitted over 75-Ω coax cable.

The equalizer operates over a wide range of data

rates from 125 Mbps to 2.97 Gbps. The equalizer

includes an active sensing circuitry that ensures

robust performance and enhanced immunity to

variations in the input signal launch amplitude.

The LMH0324 provides extended cable reach with

low power consumption. It offers power management

to reduce power consumption further when no input

signal is present.

The LMH0324 has two differential serial data outputs,

which provide flexibility for fan-out buffering. The

output drivers offer programmable de-emphasis to

compensate for board trace losses at the LMH0324

outputs. The operating state of the LMH0324 can be

set via pin control. Additional settings of the device

can be programmed via SPI or SMBus interface.

The LMH0324 is pin-compatible to the LMH1219 (12-

Gbps adaptive cable equalizer with integrated

reclocker). The pin compatibility allows ease of

upgrade from a 3-Gbps equalizer to a 12-Gbps

equalizer with integrated reclocker.