GENERAL DESCRIPTION

The AD8134 is a major advancement beyond using discrete op amps for driving differential RGB signals over twisted pair cable. The AD8134 is a triple, low cost differential or single-ended input to differential output driver, and each amplifier has a fixed gain of 2 to compensate for the attenuation of the line termination resistors. The AD8134 is specifically designed for RGB signals but can be used for any type of analog signals or high speed data transmission. The AD8134 is capable of driving either Category 5 (Cat-5) unshielded twisted pair (UTP) cable or differential printed circuit board transmission lines with minimal signal degradation.

FEATURES

Triple high speed differential driver

225 MHz, −3 dB large signal bandwidth

450 MHz, −3 dB small signal bandwidth

Easily drives 1.4 V p-p video signal into doubly terminated

100 Ω UTP cable

1600 V/μs slew rate

Fixed internal gain of 2

Internal common-mode feedback network

Output balance error −60 dB @ 50 MHz

On-chip sync-on-common-mode circuitry

Output pull-down feature for line isolation

Differential input and output

Differential-to-differential or single-ended-to-differential

operation

High isolation between amplifiers: 80 dB @ 10 MHz

Low distortion: 64 dB SFDR @ 10 MHz on 5 V supply,

RL, dm = 200 Ω

Low offset: 3 mV typical output-referred on 5 V supply

Low power: 26.5 mA @ 5 V for three drivers and sync circuitry

Wide supply voltage range: +5 V to ±5 V

Available in space-saving packaging: 4 mm × 4 mm LFCSP

APPLICATIONS

Keyboard-video-mouse (KVM) networking