ADS1202

SBAS275B – DECEMBER 2002 – REVISED JULY 2004

www.ti.com

DESCRIPTION

The ADS1202 is a precision, 80dB dynamic range, delta-

sigma (

∆Σ) modulator operating from a single +5V supply.

The differential inputs are ideal for direct connections to

transducers or low-level signals. With the appropriate digital

filter and modulator rate, the device can be used to achieve

16-bit Analog-to-Digital (A/D) conversion with no missing

codes. Effective resolution of 12 bits can be maintained with

a digital filter bandwidth of 10kHz at a modulator rate of

10MHz. The ADS1202 is designed for use in medium reso-

lution measurement applications including current measure-

ments, smart transmitters, industrial process control, weigh

scales, chromatography, and portable instrumentation. It is

available in a TSSOP-8 package.

FEATURES

q 16-BIT RESOLUTION

q 13-BIT LINEARITY

q RESOLUTION/SPEED TRADE-OFF:

10-Bit Effective Resolution with 20

µs Signal

Delay (12-bit with 77

µs)

q

q 2% INTERNAL REFERENCE VOLTAGE

q 2% GAIN ERROR

q FLEXIBLE SERIAL INTERFACE WITH FOUR

DIFFERENT MODES

q IMPLEMENTED TWINNED BINARY CODING AS

SPLIT PHASE OR MANCHESTER CODING FOR

ONE LINE INTERFACING

q OPERATING TEMPERATURE RANGE:

–40

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of Texas Instruments

standard warranty. Production processing does not necessarily include

testing of all parameters.

Copyright © 2002-2004, Texas Instruments Incorporated

Motor Control Current Shunt

1-Bit, 10MHz, 2nd-Order, Delta-Sigma Modulator

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

APPLICATIONS

q MOTOR CONTROL

q CURRENT MEASUREMENT

q INDUSTRIAL PROCESS CONTROL

q INSTRUMENTATION

q SMART TRANSMITTERS

q PORTABLE INSTRUMENTS

q WEIGHT SCALES

q PRESSURE TRANSDUCERS

Buffer

Reference

Voltage

2.5V

2nd-Order

∆∑ Modulator

RC Oscillator

20MHz

Interface

Circuit

MDAT

MCLK

M0

M1

V

IN+

V

IN–

V

DD

GND