1 Features

1• Supports ST-2082-1 (12G), ST-2081-1 (6G), ST-

424 (3G), ST-292 (HD), and ST-259 (SD)

• Compatible with DVB-ASI and AES10 (MADI)

• Dual differential output cable drivers

• On-chip 75-Ω termination and return loss

compensation network

• Host-side equalized 100-Ω loop-back output

• Programmable slew rate control on 75-Ω outputs

• Programmable pre-emphasis and output

amplitude on 75-Ω outputs

• Programmable de-emphasis and output amplitude

on 100-Ω output

• Polarity inversion on 75-Ω and 100-Ω outputs

• Automatic power save in absence of input signal

– Power consumption: 25 mW (Typical)

• Power-down control through ENABLE pin

• Single 2.5-V supply

– Power consumption: 200 mW (typical)

• Programmable through pins, SPI, or SMBus

interface

• –40°C to +85°C operating temperature range

• 5-mm × 5-mm, 32-pin WQFN package

2 Applications

• SMPTE compatible serial digital interface

• UHDTV/4K/8K/HDTV/SDTV video

• IP media gateway

• Digital video processing and editing

3 Description

LMH1208 device is a 12G UHD-SDI low power dual

output cable driver. It supports SMPTE video rates up

to 11.88 Gbps, enabling UHD video for 4K/8K

applications. The additional equalized 100-Ω driver

output on the host-side can be used for monitoring or

signal distribution purposes.

The programmable PCB input equalizer provides high

frequency boost to reduce inter symbol interference

(ISI) induced by PCB board trace. The integrated 75-

Ω termination and return loss network at both cable

driver outputs facilitate overall system design in

meeting stringent SMPTE return loss requirements.

Input Signal Detect determines the presence of a

valid signal at the input of the cable driver. This

sensing feature may be used to alert the user of a

system fault and activate a Power Save Mode,

reducing the power consumption of the cable driver.

The LMH1208 provides selectable slew rates for data

rates up to 11.88 Gbps. The output slew rate and

amplitude can be controlled by pin, SPI, or SMBus

control.

The LMH1208 is powered from a single 2.5-V supply.

It is offered in a small footprint 5 mm × 5 mm 32-pin

WQFN package. The LMH1208 is pin compatible with

the LMH1228 (12G Dual Cable Driver with Integrated

Reclocker).