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ADS1252U Datasheet PDF - Burr-Brown Corporation

Part Number ADS1252U
Description 24-Bit/ 40kHz ANALOG-TO-DIGITAL CONVERTER
Manufacturers Burr-Brown Corporation 
Logo Burr-Brown Corporation Logo 



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ADS1252U datasheet, circuit
®
ADS1252
ADS1252
For most current data sheet and other product
information, visit www.burr-brown.com
24-Bit, 40kHz
ANALOG-TO-DIGITAL CONVERTER
FEATURES
q 24 BITS NO MISSING CODES
q 19 BITS EFFECTIVE RESOLUTION UP TO
40kHz DATA RATE
q LOW NOISE: 2.5ppm
q DIFFERENTIAL INPUTS
q INL: 0.0015% (max)
q EXTERNAL REFERENCE
q POWER-DOWN MODE
q SYNC MODE
APPLICATIONS
q CARDIAC DIAGNOSTICS
q DIRECT THERMOCOUPLE INTERFACE
q BLOOD ANALYSIS
q INFRARED PYROMETER
q LIQUID/GAS CHROMATOGRAPHY
q PRECISION PROCESS CONTROL
DESCRIPTION
The ADS1252 is a precision, wide dynamic range,
delta-sigma, Analog-to-Digital (A/D) converter with
24-bit resolution operating from a single +5V supply.
The delta-sigma architecture is used for wide dynamic
range and to guarantee 24 bits of no missing code
performance. An effective resolution of 19 bits (2.5ppm
of rms noise) is achieved for conversion rates up to
40kHz.
The ADS1252 is designed for high-resolution mea-
surement applications in cardiac diagnostics, smart
transmitters, industrial process control, weigh scales,
chromatography, and portable instrumentation. The
converter includes a flexible, two-wire synchronous
serial interface for low-cost isolation.
The ADS1252 is a single-channel converter and is
offered in an SO-8 package.
ADS1252
+VIN
–VIN
+
4th-Order
∆Σ
Modulator
Digital
Filter
Serial
Interface
Control
VREF
CLK
SCLK
DOUT/DRDY
+VDD
GND
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/ • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1999 Burr-Brown Corporation
PDS-1550
Printed in U.S.A. June, 2000

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ADS1252U equivalent
TYPICAL PERFORMANCE CURVES (Cont.)
At TA = +25°C, VDD = +5V, CLK = 14.7456MHz, and VREF = 4.096, unless otherwise specified.
600
500
400
300
200
100
0
–100
–200
–300
–400
–40
GAIN DRIFT vs TEMPERATURE
–20 0
20 40 60 80
Temperature (°C)
100
100
95
90
85
80
75
70
65
60
0
POWER SUPPLY REJECTION RATIO
vs TEMPERATURE
5 10 15
CLK Frequency (MHz)
20
110
105
100
95
90
85
80
0
COMMON-MODE REJECTION RATIO
vs FREQUENCY
5 10 15
Frequency (Hz)
20
45
40
35
30
25
20
15
10
5
0
0
POWER DISSIPATION vs CLOCK FREQUENCY
5 10 15
Clock Frequency (MHz)
20
9.5
9
8.5
8
7.5
7
6.5
6
5.5
5
–40
–20
CURRENT vs FREQUENCY
0 20 40 60
Temperature (°C)
80 100
0
–20
–40
–60
–80
–100
–120
–140
–160
–180
0
TYPICAL FFT ANALYSIS
OF THE 1kHz fS INPUT SIGNAL
2000 4000 6000 8000 10000 12000 14000
Frequency (Hz)
®
5 ADS1252

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Information Total 14 Pages
Download[ ADS1252U.PDF Datasheet ]

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