450 MH, Triple 16 × 5 Video Crosspoint Switch

The AD8178 is a high speed, triple 16 × 5 video crosspoint switch matrix. It supports 1600 × 1200 RGB displays @ 85 Hz refresh rate, by offering a 450 MHz bandwidth and a slew rate of 1650 V/μs. With −82 dB of crosstalk and −90 dB isolation (@ 5 MHz), the AD8178 is useful in many high speed video applications.

The AD8178 supports two modes of operation: differential-in to differential-out mode with sync-on CM signaling passed through the switch and differential-in to differential-out mode with CM signaling removed through the switch. The output CM and black level can be conveniently set via external pins.

The outputs can be used single-ended in conjunction with decoded H and V outputs to drive a monitor directly.

The independent output buffers of the AD8178 can be placed into a high impedance state to create larger arrays by paralleling crosspoint outputs. Inputs can be paralleled as well. The AD8178 offers both serial and a parallel programming modes.

The AD8178 is packaged in a fully-populated 26 × 26 ball PBGA package and is available over the extended industrial temperature range of −40°C to +85°C.

Applications

* RGB video switching

* KVM

* Professional video

* Large, triple 16 × 5 high speed, nonblocking switch array

* Pin compatible with AD8175, AD8176 (16 × 9 switch arrays) and AD8177 (16 × 5 switch array)

* Differential or single-ended operation

* Supports sync-on common-mode and sync-on color operating modes

* RGB and HV outputs available for driving monitor directly

* G = +4 operation (differential input to differential output)

* Flexible power supplies: +5 V or ±2.5 V Logic ground for convenient control interface

* Serial or parallel programming of switch array

* High impedance output disable allows connection of multiple devices with minimal loading on output bus

* Adjustable output CM and black level through external pins

* Excellent ac performance Bandwidth: 450 MHz Slew rate: 1650 V/μs Settling time: 4 ns to 1% to support 1600 × 1200 @ 85Hz

* Low power of 2.3 W