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ADS8322 Schematic ( PDF Datasheet ) - Burr-Brown Corporation

Teilenummer ADS8322
Beschreibung 16-Bit/ 500kHz/ MicroPower Sampling ANALOG-TO-DIGITAL CONVERTER
Hersteller Burr-Brown Corporation
Logo Burr-Brown Corporation Logo 




Gesamt 10 Seiten
ADS8322 Datasheet, Funktion
ADS8322 ®
ADS8322
SBAS215 JULY 2001
16-Bit, 500kHz, MicroPower Sampling
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q HIGH-SPEED PARALLEL INTERFACE
q 500kHz SAMPLING RATE
q LOW POWER: 85mW at 500kHz
q INTERNAL 2.5V REFERENCE
q UNIPOLAR INPUT RANGE
q TQFP-32 PACKAGE
APPLICATIONS
q CT SCANNERS
q HIGH SPEED DATA ACQUISITION
q TEST AND INSTRUMENTATION
q MEDICAL EQUIPMENT
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.
SAR
+IN
–IN
REFIN
REFOUT
ADS8322
S/H Amp
CDAC
Comparator
Internal
+2.5V Ref
Output Latches
and
Three State
Drivers
BYTE
Parallel
Data
Output
Conversion
and Control
Logic
CLOCK
CONVST
CS
RD
BUSY
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.
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.
www.ti.com
Copyright © 2001, Texas Instruments Incorporated






ADS8322 Datasheet, Funktion
TYPICAL CHARACTERISTICS (Cont.)
At 40°C to +85°C, +VA = +5V, VREF = +2.5V, fSAMPLE = 500kHz, and fCLK = 20 fSAMPLE, unless otherwise specified.
0.05
0.00
0.05
0.10
0.15
0.20
0.25
40
20
DLvs TEMPERATURE
0 20 40 60
Temperature (°C)
80 100
2.5
2.0
1.5
1.0
0.5
0.0
0.5
1.0
1.5
40
OFFSET ERROR vs TEMPERATURE
20 0
20 40 60 80
Temperature (°C)
100
GAIN ERROR vs TEMPERATURE
8
6
4
2
0
2
40
20
0 20 40 60
Temperature (°C)
80 100
2.0
1.0
0.0
1.0
2.0
3.0
4.0
5.0
6.0
7.0
8.0
40
20
VREF vs TEMPERATURE
0 20 40 60
Temperature (°C)
80 100
IQ vs TEMPERATURE
1.2
0.8
0.4
0.0
0.4
0.8
40
20
0 20 40 60
Temperature (°C)
80 100
6 ADS8322
SBAS215

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