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XTR105UA Datasheet(PDF) 1 Page - Texas Instruments |
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XTR105UA Datasheet(HTML) 1 Page - Texas Instruments |
1 / 21 page RTD XTR105 – 4-20 mA V PS V O R L R G V LIN V REG + 7.5V to 36V I R = 0.8mA I R = 0.8mA 4-20mA CURRENT TRANSMITTER with Sensor Excitation and Linearization FEATURES q LOW UNADJUSTED ERROR q TWO PRECISION CURRENT SOURCES: 800 µA each q LINEARIZATION q 2- OR 3-WIRE RTD OPERATION q LOW OFFSET DRIFT: 0.4 µV/°C q LOW OUTPUT CURRENT NOISE: 30nA PP q HIGH PSR: 110dB minimum q HIGH CMR: 86dB minimum q WIDE SUPPLY RANGE: 7.5V to 36V q DIP-14 AND SO-14 PACKAGES APPLICATIONS q INDUSTRIAL PROCESS CONTROL q FACTORY AUTOMATION q SCADA REMOTE DATA ACQUISITION q REMOTE TEMPERATURE AND PRESSURE TRANSDUCERS −200°C Pt100 NONLINEARITY CORRECTION USING XTR105 Process Temperature ( °C) +850 °C 5 4 3 2 1 0 −1 Uncorrected RTD Nonlinearity Corrected Nonlinearity DESCRIPTION The XTR105 is a monolithic 4-20mA, 2-wire current transmit- ter with two precision current sources. It provides complete current excitation for platinum RTD temperature sensors and bridges, instrumentation amplifiers, and current output cir- cuitry on a single integrated circuit. Versatile linearization circuitry provides a 2nd-order correc- tion to the RTD, typically achieving a 40:1 improvement in linearity. Instrumentation amplifier gain can be configured for a wide range of temperature or pressure measurements. Total un- adjusted error of the complete current transmitter is low enough to permit use without adjustment in many applica- tions. This includes zero output current drift, span drift, and nonlinearity. The XTR105 operates on loop power-supply voltages down to 7.5V. The XTR105 is available in DIP-14 and SO-14 surface- mount packages and is specified for the –40 °C to +85°C industrial temperature range. XTR105 XTR105 XTR105 SBOS061B – FEBRUARY 1997 – REVISED AUGUST 2004 www.ti.com 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 © 1997-2004, 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. All trademarks are the property of their respective owners. |
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