GENERAL DESCRIPTION

The AD8112 is a low cost, fully buffered crosspoint switch matrix that operates on ±12 V for audio applications and ±5 V for video applications. It offers a −3 dB signal bandwidth greater than 60 MHz and channel switch times of less than 60 ns with 0.1 settling for use in both analog and digital audio. The AD8112 operated at 20 kHz has a crosstalk performance of −83 dB and isolation of 90 dB. In addition, ground/power pins surround all inputs and outputs to provide extra shielding for operation in the most demanding audio routing applications. With a differential gain and differential phase better than 0.1 and 0.1°, respectively, and a 0.1 dB flatness output of up to 10 MHz, the AD8112 is suitable for many video applications.

FEATURES

Low cost, 16 × 8, high speed, nonblocking switch array

Pin-compatible 16 × 16 version available (AD8113)

Serial or parallel programming of switch array

Serial data out allows daisy chaining control of multiple

16 × 8 arrays to create larger switch arrays

Output disable allows connection of multiple devices

without loading the output bus

Complete solution

Buffered inputs

8 output amplifiers

Operates on ±5 V or ±12 V supplies

Low supply current of 54 mA

Excellent audio performance VS = ±12 V

±10 V output swing

0.002 THD at 20 kHz maximum 20 V p-p (RL = 600 Ω)

Excellent video performance VS = ±5 V

0.1 dB gain flatness of 10 MHz

0.1 differential gain error (RL = 1 kΩ)

0.1° differential phase error (RL = 1 kΩ)

Excellent ac performance

−3 dB bandwidth 60 MHz

Low all-hostile crosstalk of −83 dB at 20 kHz

Reset pin allows disabling of all outputs (connected to a

capacitor to ground provides power-on reset capability)

100-lead LQFP (14 mm × 14 mm)

APPLICATIONS

CCTV surveillance/DVR

Analog/digital audio routers

Video routers (NTSC, PAL, S-Video, SECAM)

Multimedia systems

Video conferencing