ADS1201
®
©
1997 Burr-Brown Corporation 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 DGNDDV
DD
A
IN
P
A
IN
N
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
l 130dB DYNAMIC RANGE
l FULLY DIFFERENTIAL INPUT
l TWO-WIRE INTERFACE
l INTERNAL/EXTERNAL REFERENCE
l ON-CHIP SWITCHES FOR CALIBRATION
APPLICATIONS
l INDUSTRIAL PROCESS CONTROL
l INSTRUMENTATION
l SMART TRANSMITTERS
l PORTABLE INSTRUMENTS
l WEIGH SCALES
l PRESSURE TRANSDUCERS