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ADS
1
201
ADS1201
High Dynamic Range
DELTA-SIGMA MODULATOR
FEATURES
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130dB DYNAMIC RANGE
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FULLY DIFFERENTIAL INPUT
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TWO-WIRE INTERFACE
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INTERNAL/EXTERNAL REFERENCE
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ON-CHIP SWITCHES FOR CALIBRATION
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.
APPLICATIONS
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INDUSTRIAL PROCESS CONTROL
INSTRUMENTATION
SMART TRANSMITTERS
PORTABLE INSTRUMENTS
WEIGH SCALES
PRESSURE TRANSDUCERS
AV
DD
AGND
REF
IN
REF
OUT
V
BIAS
+2.5V
Reference
Bias
Generator
BIAS
EN
REF
EN
A
IN
P
A
IN
N
Second-Order
∆Σ
Modulator
MOUT
MCLK
CAL GAIN/OFFSET
DV
DD
DGND
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
©
1997 Burr-Brown Corporation
PDS-1417C
Printed in U.S.A. October, 1999
SBAS081
TI [ TEXAS INSTRUMENTS ]
