DESCRIPTION

The ADS8321 is a 16-bit sampling analog-to-digital con-

verter (ADC) with tested specifications over a 4.75V to

5.25V supply range. It requires very little power even when

operating at the full 100kHz data rate. At lower data rates,

the high speed of the device enables it to spend most of its

time in the power-down mode—the average power dissipa-

tion is less than 1mW at 10kHz data rate.

The ADS8321 also features a synchronous serial (SPI/SSI

compatible) interface, and a differential input. The refer-

ence voltage can be set to any level within the range of

500mV to VCC/2.

Ultra-low power and small size make the ADS8321 ideal

for portable and battery-operated systems. It is also a

perfect fit for remote data acquisition modules, simulta-

neous multi-channel systems, and isolated data acquisi-

tion. The ADS8321 is available in an MSOP-8 package.

16-Bit, High Speed, MicroPower Sampling

ANALOG-TO-DIGITAL CONVERTER

FEATURES

q BIPOLAR INPUT RANGE

q 100kHz SAMPLING RATE

q MICRO POWER:

4.5mW at 100kHz

1mW at 10kHz

q POWER DOWN: 3

µA max

q MSOP-8 PACKAGE

q PIN-COMPATIBLE TO ADS7816 AND ADS7822

q SERIAL (SPI/SSI) INTERFACE

APPLICATIONS

q BATTERY OPERATED SYSTEMS

q REMOTE DATA ACQUISITION

q ISOLATED DATA ACQUISITION

q SIMULTANEOUS SAMPLING,

MULTI-CHANNEL SYSTEMS

q INDUSTRIAL CONTROLS

q ROBOTICS

q VIBRATION ANALYSIS

SAR

Serial

Interface

Comparator

ADS8321

S/H Amp

DCLOCK

D

OUT

CS/SHDN

+In

V

REF

–In

CDAC

ADS8321

SBAS123B – SEPTEMBER 1999 – REVISED SEPTEMBER 2004

www.ti.com

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 © 1999-2004, Texas Instruments Incorporated

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.

All trademarks are the property of their respective owners.