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Burr-Brown Corporation

ADS1252 Datasheet Preview

ADS1252 Datasheet

ANALOG-TO-DIGITAL CONVERTER

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ADS1252
ADS1252
SBAS127D – SEPTEMBER 2000 – REVISED JUNE 2006
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 (0.5V to 5V)
q POWER-DOWN MODE
q SYNC MODE
APPLICATIONS
q CARDIAC DIAGNOSTICS
q DIRECT THERMOCOUPLE INTERFACES
q BLOOD ANALYSIS
q INFRARED PYROMETERS
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 resolu-
tion operating from a single +5V supply. The delta-sigma
architecture is used for wide dynamic range and to ensure 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 measurement
applications in cardiac diagnostics, smart transmitters, indus-
trial process control, weight scales, chromatography, and
portable instrumentation. The converter includes a flexible,
2-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
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.
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 © 2000-2006, Texas Instruments Incorporated




Burr-Brown Corporation

ADS1252 Datasheet Preview

ADS1252 Datasheet

ANALOG-TO-DIGITAL CONVERTER

No Preview Available !

ABSOLUTE MAXIMUM RATINGS(1)
Analog Input: Current ............................................... ±100mA, Momentary
±10mA, Continuous
Voltage .................................... GND 0.3V to VDD + 0.3V
VDD to GND ............................................................................ 0.3V to 6V
VREF Voltage to GND ............................................... 0.3V to VDD + 0.3V
Digital Input Voltage to GND ................................... 0.3V to VDD + 0.3V
Digital Output Voltage to GND ................................. 0.3V to VDD + 0.3V
Lead Temperature (soldering, 10s) .............................................. +300°C
Power Dissipation (any package) ................................................. 500mW
NOTE: (1) Stresses above these ratings may cause permanent damage.
Exposure to absolute maximum conditions for extended periods may degrade
device reliability.
ELECTROSTATIC
DISCHARGE SENSITIVITY
This integrated circuit can be damaged by ESD. Texas Instru-
ments recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.
ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may be
more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.
PACKAGE/ORDERING INFORMATION(1)
PRODUCT
ADS1252
"
PACKAGE-LEAD
SO-8
"
PACKAGE
DESIGNATOR
D
"
SPECIFIED
TEMPERATURE
RANGE
40°C to +85°C
"
PACKAGE
MARKING
ADS1252U
"
ORDERING
NUMBER
ADS1252U
ADS1252U/2K5
TRANSPORT
MEDIA, QUANTITY
Rails, 100
Tape and Reel, 2500
NOTE: (1) For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com.
PIN CONFIGURATION
Top View
+VIN 1
VIN 2
+VDD 3
CLK 4
ADS1252U
SO
8 VREF
7 GND
6 SCLK
5 DOUT/DRDY
PIN DESCRIPTIONS
PIN
NAME
PIN DESCRIPTION
1
+VIN
Analog Input: Positive Input of the Differen-
tial Analog Input
2 VIN Analog Input: Negative Input of the Differ-
ential Analog Input
3
+VDD
Input: Power-Supply Voltage, +5V
4
CLK
Digital Input: Device System Clock. The
system clock is in the form of a CMOS-
compatible clock. This is a Schmitt-Trigger
input.
5 DOUT/DRDY Digital Output: Serial Data Output/Data
Ready. A logic LOW on this output indi-
cates that a new output word is available
from the ADS1252 data output register.
The serial data is clocked out of the serial
data output shift register using SCLK.
6
SCLK
Digital Input: Serial Clock. The serial clock
is in the form of a CMOS-compatible clock.
The serial clock operates independently
from the system clock, therefore, it is pos-
sible to run SCLK at a higher frequency
than CLK. The normal state of SCLK is
LOW. Holding SCLK HIGH will either ini-
tiate a modulator reset for synchronizing
multiple converters or enter power-down
mode. This is a Schmitt-Trigger input.
7
GND
Input: Ground
8
VREF
Analog Input: Reference Voltage Input
2 ADS1252
www.ti.com
SBAS127D


Part Number ADS1252
Description ANALOG-TO-DIGITAL CONVERTER
Maker Burr-Brown Corporation
Total Page 23 Pages
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