GENERAL DESCRIPTION

The ADG738 and ADG739 are CMOS analog matrix switches with a serially-controlled 3-wire interface. The ADG738 is an 8-channel matrix switch, while the ADG739 is a dual 4-channel matrix switch. On resistance is closely matched between switches and very flat over the full signal range.

The ADG738 and ADG739 utilize a 3-wire serial interface that is compatible with SPI?, QSPI?, MICROWIRE?, and some DSP interface standards. The output of the input shift register, DOUT, enables a number of these parts to be daisy-chained. On power-up, the internal input shift register contains all zeros and all switches are in the off state.

FEATURES

3-wire serial interface

2.7 V to 5.5 V single supply

2.5 Ω on resistance

0.75 Ω on-resistance flatness

100 pA leakage currents

Single 8-to-1 multiplexer ADG738

Dual 4-to-1 multiplexer ADG739

Power-on reset

TTL/CMOS-compatible

Qualified for automotive applications

APPLICATIONS

Data acquisition systems

Communication systems

Relay replacement

Audio and video switching