DESCRIPTION
The ADS8322 is a 16-bit, 500kHz Analog-to-Digital (A/D)
converter with an internal 2.5V reference. The device in-
cludes a 16-bit capacitor-based Successive Approximation
Register (SAR) A/D converter with inherent sample-and-
hold. The ADS8322 offers a full 16-bit interface, or an 8-bit
option where data is read using two read cycles and 8 pins.
The ADS8322 is available in a TQFP-32 package and is
guaranteed over the industrial –40°C to +85°C temperature
range.
16-Bit, 500kHz, MicroPower Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
a71 HIGH-SPEED PARALLEL INTERFACE
a71 500kHz SAMPLING RATE
a71 LOW POWER: 85mW at 500kHz
a71 INTERNAL 2.5V REFERENCE
a71 UNIPOLAR INPUT RANGE
a71 TQFP-32 PACKAGE
APPLICATIONS
a71 CT SCANNERS
a71 HIGH SPEED DATA ACQUISITION
a71 TEST AND INSTRUMENTATION
a71 MEDICAL EQUIPMENT
SAR
Output Latches
and
Three State
Drivers
Comparator
ADS8322
S/H Amp
BYTE
Parallel
Data
Output
+IN
–IN
CDAC
REF
IN
Conversion
and Control
Logic
Internal
+2.5V Ref
CONVST
CLOCK
CS
RD
BUSY
REF
OUT
ADS8322 ®
ADS8322
SBAS215 – JULY 2001
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 © 2001, 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.