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DS1244 Dataheets PDF



Part Number DS1244
Manufacturers Burr-Brown Corporation
Logo Burr-Brown Corporation
Description Low-Power / 24-Bit ANALOG-TO-DIGITAL CONVERTER
Datasheet DS1244 DatasheetDS1244 Datasheet (PDF)

ADS1244 ADS1 244 SBAS273 – DECEMBER 2002 Low-Power, 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q 20-BIT EFFECTIVE RESOLUTION q CURRENT CONSUMPTION: 90µA q ANALOG SUPPLY: 2.5V to 5.25V q DIGITAL SUPPLY: 1.8V to 3.6V q ±5V DIFFERENTIAL INPUT RANGE q 0.0002% INL (TYP), 0.0008% INL (MAX) q SIMPLE 2-WIRE SERIAL INTERFACE q SIMULTANEOUS 50Hz AND 60Hz REJECTION q SINGLE CONVERSIONS WITH SLEEP MODE q SINGLE-CYCLE SETTLING q SELF-CALIBRATION q WELL-SUITED FOR MULTICHANNEL SYSTEMS q EASILY CONNECTS TO .

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ADS1244 ADS1 244 SBAS273 – DECEMBER 2002 Low-Power, 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q 20-BIT EFFECTIVE RESOLUTION q CURRENT CONSUMPTION: 90µA q ANALOG SUPPLY: 2.5V to 5.25V q DIGITAL SUPPLY: 1.8V to 3.6V q ±5V DIFFERENTIAL INPUT RANGE q 0.0002% INL (TYP), 0.0008% INL (MAX) q SIMPLE 2-WIRE SERIAL INTERFACE q SIMULTANEOUS 50Hz AND 60Hz REJECTION q SINGLE CONVERSIONS WITH SLEEP MODE q SINGLE-CYCLE SETTLING q SELF-CALIBRATION q WELL-SUITED FOR MULTICHANNEL SYSTEMS q EASILY CONNECTS TO THE MSP430 DESCRIPTION The ADS1244 is a 24-bit, delta-sigma Analog-to-Digital (A/D) converter. It offers excellent performance and very low power in an MSOP-10 package and is well suited for demanding high-resolution measurements, especially in portable and other space- and power-constrained systems. A 3rd-order delta-sigma modulator and digital filter form the basis of the A/D converter. The analog modulator has a ±5V differential input range. The digital filter rejects both 50Hz and 60Hz signals, completely settles in one cycle, and outputs data at 15 samples per second. A simple, 2-wire serial interface provides all the necessary control. Data retrieval, self-calibration, and Sleep Mode are handled with a few simple waveforms. When only single conversions are needed, the ADS1244 can be shut down (Sleep Mode) while idle between measurements to dramatically reduce the overall power dissipation. Multiple ADS1244s can be connected together to create a synchronously sampling multichannel measurement system. The ADS1244 is designed to easily connect to microcontrollers, such as the MSP430. The ADS1244 supports 2.5V to 5.25V analog supplies and 1.8V to 3.6V digital supplies. Power is typically less than 270µW in normal operation and less than 1µW during Sleep Mode. APPLICATIONS q HAND-HELD INSTRUMENTATION q PORTABLE MEDICAL EQUIPMENT q INDUSTRIAL PROCESS CONTROL q WEIGH SCALES VREFP VREFN AVDD DVDD CLK DRDY/DOUT Digital Filter Serial Interface SCLK AINP AINN 3rd-Order Modulator 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. 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 © 2002, Texas Instruments Incorporated www.ti.com ABSOLUTE MAXIMUM RATINGS(1) AVDD to GND ....................................................................... –0.3V to +6V DVDD to GND ................................................................... –0.3V to +3.6V Input Current ............................................................... 100mA, Momentary Input Current ................................................................ 10mA, Continuous Analog Input Voltage to GND .............................. –0.5V to AVDD + 0.5V Digital Input Voltage to GND ............................... –0.3V to DVDD + 0.3V Digital Output Voltage to GND ............................. –0.3V to DVDD + 0.3V Maximum Junction Temperature ................................................... +150°C Operating Temperature Range ........................................ –40°C to +85°C Storage Temperature Range ......................................... –60°C to +150°C Lead Temperature (soldering, 10s) ............................................... +300°C NOTE: (1) Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. Exposure to absolute maximum conditions for extended periods may affect device reliability. ELECTROSTATIC DISCHARGE SENSITIVITY This integrated circuit can be damaged by ESD. Texas Instruments 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. DEMO BOARD ORDERING INFORMATION PRODUCT ADS1244-EVM DESCRIPTION ADS1244 Evaluation Module PACKAGE/ORDERING INFORMATION PACKAGE DESIGNATOR(1) DGS SPECIFIED TEMPERATURE RANGE –40°C to +85°C PACKAGE MARKING BHG ORDERING NUMBER ADS1244IDGST ADS1244IDGSR TRANSPORT MEDIA, QUANTITY Tape and Reel, 250 Tape and Reel, 2500 PRODUCT ADS1244 PACKAGE-LEAD MSOP-10 " " " " " NOTE: (1) For the most current specifications and package information, refer to our web site at www.ti.com. PIN CONFIGURATION Top View MSOP PIN DESCRIPTIONS PIN NUMBER 1 2 NAME GND VREFP VREFN AINN AINP AVDD DVDD DRDY/ DOUT DESCRIPTION Analog and Digital Ground Positive Reference Input Negative Reference Input Negative Analog Input Positive Analog Input Analog Power Supply, .


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