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Burr-Brown Corporation - 22-Bit ANALOG-TO-DIGITAL CONVERTER

Numéro de référence ADS1213U
Description 22-Bit ANALOG-TO-DIGITAL CONVERTER
Fabricant Burr-Brown Corporation 
Logo Burr-Brown Corporation 





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ADS1213U fiche technique
® ADS1212
ADS1213
ADS1212
ADS1213
ADS1213
ADS1212
ADS1213
PATENTS PENDING
22-Bit ANALOG-TO-DIGITAL CONVERTER
FEATURES
q DELTA-SIGMA A/D CONVERTER
q 22 BITS NO MISSING CODES
q 20 BITS EFFECTIVE RESOLUTION AT 10Hz
AND 16 BITS AT 1000Hz
q LOW POWER: 1.4mW
q DIFFERENTIAL INPUTS
q PROGRAMMABLE GAIN AMPLIFIER
q SPI COMPATIBLE SSI INTERFACE
q PROGRAMMABLE CUT-OFF FREQUENCY
UP TO 6.25kHz
q INTERNAL/EXTERNAL REFERENCE
q ON CHIP SELF-CALIBRATION
q ADS1213 INCLUDES 4 CHANNEL MUX
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q INSTRUMENTATION
q BLOOD ANALYSIS
q SMART TRANSMITTERS
q PORTABLE INSTRUMENTS
q WEIGH SCALES
q PRESSURE TRANSDUCERS
DESCRIPTION
The ADS1212 and ADS1213 are precision, wide
dynamic range, delta-sigma analog-to-digital converters
with 24-bit resolution operating from a single +5V
supply. The differential inputs are ideal for direct
connection to transducers or low level voltage sig-
nals. The delta-sigma architecture is used for wide
dynamic range and to guarantee 22 bits of no missing
code performance. An effective resolution of 20 bits
is achieved through the use of a very low-noise input
amplifier at conversion rates up to 10Hz. Effective
resolutions of 16 bits can be maintained up to a
sample rate of 1kHz through the use of the unique
Turbo modulator mode of operation. The dynamic
range of the converters is further increased by provid-
ing a low-noise programmable gain amplifier with a
gain range of 1 to 16 in binary steps.
The ADS1212 and ADS1213 are designed for high
resolution measurement applications in smart trans-
mitters, industrial process control, weigh scales, chro-
matography and portable instrumentation. Both con-
verters include a flexible synchronous serial interface
which is SPI compatible and also offers a two-wire
control mode for low cost isolation.
The ADS1212 is a single channel converter and is
offered in both 18-pin DIP and 18-lead SOIC pack-
ages. The ADS1213 includes a 4 channel input multi-
plexer and is available in 24-pin DIP, 24-lead SOIC,
and 28-lead SSOP packages.
AGND AVDD REFOUT
REFIN
VBIAS
XIN XOUT
AIN1P
AIN1N
AIN2P
AIN2N
AIN3P
AIN3N
AIN4P
AIN4N
MUX
AINP
AINN
+2.5V
Reference
+3.3V Bias
Generator
Clock Generator
PGA
Second-Order
∆∑
Modulator
Third-Order
Digital Filter
Micro Controller
Instruction Register
Command Register
Data Output Register
Offset Register
Full-Scale Register
Modulator Control
Serial Interface
DGND
DVDD
SCLK
SDIO
SDOUT
ADS1213 Only
ADS1212/13
DSYNC
CS MODE DRDY
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/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1996 Burr-Brown Corporation
PDS1-1360C
ADS121P2ri,nte1d 2in1U.3S.A. April, 1998
®

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