ADS1201

®

PDS-1417C

Printed in U.S.A. October, 1999

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

High Dynamic Range

DELTA-SIGMA MODULATOR

ADS1201

+2.5V

Reference

Bias

Generator

Second-Order

∆Σ

Modulator

AV

DD

AGND

REF

OUT

REF

IN

V

BIAS

CAL GAIN/OFFSET

DGND

DV

DD

A

A

MOUT

BIAS

EN

REF

EN

MCLK

DESCRIPTION

The ADS1201 is a precision, 130dB dynamic range,

delta-sigma (

∆Σ) modulator operating from a single

+5V supply. The differential inputs are ideal for direct

connection to transducers or low level signals. With

the appropriate digital filter and modulator rate, the

device can be used to achieve 24-bit analog-to-digital

(A/D) conversion with no missing codes. Effective

resolution of 20 bits can be maintained with a digital

filter bandwidth of 1kHz at a modulator rate of 320kHz.

The ADS1201 is designed for use in high resolution

measurement applications including smart transmit-

ters, industrial process control, weigh scales, chroma-

tography, and portable instrumentation. It is available

in a 16-lead SOIC package.

FEATURES

q 130dB DYNAMIC RANGE

q FULLY DIFFERENTIAL INPUT

q TWO-WIRE INTERFACE

q INTERNAL/EXTERNAL REFERENCE

q ON-CHIP SWITCHES FOR CALIBRATION

APPLICATIONS

q INDUSTRIAL PROCESS CONTROL

q INSTRUMENTATION

q SMART TRANSMITTERS

q PORTABLE INSTRUMENTS

q WEIGH SCALES

q PRESSURE TRANSDUCERS

SBAS081