General Description

The ADC0831 series are 8-bit successive approximation A/D

converters with a serial I/O and configurable input multiplexers

with up to 8 channels. The serial I/O is configured to

comply with the NSC MICROWIRE™ serial data exchange

standard for easy interface to the COPS™ family of processors,

and can interface with standard shift registers or μPs.

The 2-, 4- or 8-channel multiplexers are software configured

for single-ended or differential inputs as well as channel

assignment.

The differential analog voltage input allows increasing the

common-mode rejection and offsetting the analog zero input

voltage value. In addition, the voltage reference input can be

adjusted to allow encoding any smaller analog voltage span

to the full 8 bits of resolution.

Features

n NSC MICROWIRE compatible—direct interface to

COPS family processors

n Easy interface to all microprocessors, or operates

“stand-alone”

n Operates ratiometrically or with 5 VDC voltage reference

n No zero or full-scale adjust required

n 2-, 4- or 8-channel multiplexer options with address logic

n Shunt regulator allows operation with high voltage

supplies

n 0V to 5V input range with single 5V power supply

n Remote operation with serial digital data link

n TTL/MOS input/output compatible

n 0.3 standard width, 8-, 14- or 20-pin DIP package

n 20 Pin Molded Chip Carrier Package (ADC0838 only)

n Surface-Mount Package