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ADS1242IPWRG4 Datasheet(PDF) 1 Page - Texas Instruments |
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ADS1242IPWRG4 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 32 page 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. 24-Bit ANALOG-TO-DIGITAL CONVERTER FEATURES q 24 BITS NO MISSING CODES q SIMULTANEOUS 50Hz AND 60Hz REJECTION (–90dB MINIMUM) q 0.0015% INL q 21 BITS EFFECTIVE RESOLUTION (PGA = 1), 19 BITS (PGA = 128) q PGA GAINS FROM 1 TO 128 q SINGLE-CYCLE SETTLING q PROGRAMMABLE DATA OUTPUT RATES q EXTERNAL DIFFERENTIAL REFERENCE OF 0.1V TO 5V q ON-CHIP CALIBRATION q SPI™ COMPATIBLE q 2.7V TO 5.25V SUPPLY RANGE q 600 µW POWER CONSUMPTION q UP TO EIGHT INPUT CHANNELS q UP TO EIGHT DATA I/O DESCRIPTION The ADS1242 and ADS1243 are precision, wide dynamic range, delta-sigma, analog-to-digital (A/D) converters with 24-bit resolution operating from 2.7V to 5.25V supplies. These delta-sigma, A/D converters provide up to 24 bits of no missing code performance and effective resolution of 21 bits. The input channels are multiplexed. Internal buffering can be selected to provide a very high input impedance for direct connection to transducers or low-level voltage signals. Burn- out current sources are provided that allow for the detection of an open or shorted sensor. An 8-bit digital-to-analog converter (DAC) provides an offset correction with a range of 50% of the FSR (Full-Scale Range). The Programmable Gain Amplifier (PGA) provides selectable gains of 1 to 128 with an effective resolution of 19 bits at a gain of 128. The A/D conversion is accomplished with a second-order delta-sigma modulator and programmable FIR filter that pro- vides a simultaneous 50Hz and 60Hz notch. The reference input is differential and can be used for ratiometric conversion. The serial interface is SPI compatible. Up to eight bits of data I/O are also provided that can be used for input or output. The ADS1242 and ADS1243 are designed for high-resolution measurement applications in smart transmitters, industrial process control, weight scales, chromatography, and portable instrumentation. APPLICATIONS q INDUSTRIAL PROCESS CONTROL q LIQUID /GAS CHROMATOGRAPHY q BLOOD ANALYSIS q SMART TRANSMITTERS q PORTABLE INSTRUMENTATION q WEIGHT SCALES ADS1242 ADS1243 SBAS235H – DECEMBER 2001 – REVISED OCTOBER 2013 www.ti.com Copyright © 2001-2013, Texas Instruments Incorporated 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. ® ADS1 243 ® ADS1 242 BUF PGA A = 1:128 + Clock Generator Serial Interface 2nd-Order Modulator GND V DD IN+ IN– V REF+ V REF– X IN X OUT PDWN DRDY SCLK D IN D OUT CS MUX A IN0/D0 A IN1/D1 A IN2/D2 A IN3/D3 A IN4/D4 A IN5/D5 A IN6/D6 A IN7/D7 Controller Registers Digital Filter 2 µA V DD Offset DAC GND 2 µA ADS1243 Only All trademarks are the property of their respective owners. |
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