ADS7842

12-Bit, 4-Channel Parallel Output Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

q SINGLE SUPPLY: 2.7V to 5V

q 4-CHANNEL INPUT MULTIPLEXER

q UP TO 200kHz SAMPLING RATE

q FULL 12-BIT PARALLEL INTERFACE

q

q GUARANTEED NO MISSING CODES

q 72dB SINAD

q LOW POWER: 2mW

q SSOP-28 PACKAGE

®

DESCRIPTION

The ADS7842 is a complete, 4-channel, 12-bit analog-

to-digital converter (ADC). It contains a 12-bit, ca-

pacitor-based, SAR A/D with a sample-and-hold am-

plifier, interface for microprocessor use and parallel,

three-state output drivers. The ADS7842 is specified

at a 200kHz sampling rate while dissipating only

2mW of power. The reference voltage can be varied

lution from 24

µV to 1.22mV. The ADS7842 is guar-

anteed down to 2.7V operation.

Low power, high speed and an on-board multiplexer

make the ADS7842 ideal for battery-operated sys-

tems such as portable, multi-channel dataloggers and

measurement equipment. The ADS7842 is available

in a SSOP-28 package and is guaranteed over the

–40

°C to +85°C temperature range.

PDS-1484B

Printed in U.S.A. March, 2000

APPLICATIONS

q DATA ACQUISITION

q TEST AND MEASUREMENT

q INDUSTRIAL PROCESS CONTROL

q MEDICAL INSTRUMENTS

q LABORATORY EQUIPMENT

International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111

Twx: 910-952-1111 • Internet: http://www.burr-brown.com/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132

ADS7842

SAR

Output

Latches

and

Three

State

Drivers

Three

State

Parallel

Data Bus

Comparator

ADS7842

CS

WR

BUSY

CLK

RD

CDAC

V

REF

4-Channel

MUX

AIN2

AIN1

AIN0

A0

A1

AIN3

For most current data sheet and other product

information, visit www.burr-brown.com