GENERAL DESCRIPTION

The ADG1438 and ADG1439 are CMOS analog matrix switches with a serially controlled 3-wire interface. The ADG1438 is an 8-channel matrix switch, and the ADG1439 is a dual 4-channel matrix switch.

The ADG1438/ADG1439 use a versatile 3-wire serial interface that operates at clock rates of up to 50 MHz and is compatible with standard SPI, QSPI™, MICROWIRE™, and DSP interface standards. The output of the shift register, SDO, enables a number of the ADG1438/ADG1439 parts to be daisy-chained. On power-up, the internal shift register contains all zeros, and all switches are in the off state.

FEATURES

Serial interface up to 50 MHz

SDO daisy-chaining option

9.5 Ω on resistance @ 25°C

1.6 Ω on-resistance flatness

Fully specified at ±15 V/+12 V/±5 V

3 V logic-compatible inputs

Rail-to-rail operation

20-lead TSSOP and 20-lead ,4 mm × 4 mm LFCSP packages

APPLICATIONS

Relay replacement

Audio and video routing

Automatic test equipment

Data acquisition systems

Temperature measurement systems

Avionics

Battery-powered systems

Communication systems

Medical equipment