XTR105 Datasheet | Burr-Brown

FEATURES q LOW UNADJUSTED ERROR q TWO PRECISION CURRENT SOURCES: 800µA each q LINEARIZATION q 2- OR 3-WIRE RTD OPERATION q LOW OFFSET DRIFT: 0.4µV/°C q LOW OUTPUT CURRENT NOISE: 30n APP q HIGH PSR: 110d B minimum q HIGH CMR: 86d B minimum q WIDE SUPPLY RANGE: 7.5V to 36V q DIP-14 AND SO-14 PACKAGES DESCRIPTION The XTR105 is a monolithic 4-20m A, 2-wire current transmitter with two precision current sources. It provides plete current excitation for platinum RTD temperature sensors and bridges, instrumentation amplifiers, and current output circuitry on a single integrated circuit. Versatile linearization circuitry provides a 2nd-order correction 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 unadjusted error of the plete current transmitter is low enough to permit use without adjustment in many applications. 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 surfacemount packages and is specified for the - 40°C to +85°C industrial temperature range. APPLICATIONS q INDUSTRIAL PROCESS CONTROL q FACTORY AUTOMATION q SCADA REMOTE DATA ACQUISITION q REMOTE TEMPERATURE AND PRESSURE TRANSDUCERS Nonlinearity (%) 5 4 3 2 1 0 - 1 - 200°C Pt100 NONLINEARITY CORRECTION USING XTR105 Uncorrected RTD Nonlinearity Corrected Nonlinearity Process Temperature (°C) +850°C IR = 0.8m A IR = 0.8m A + VLIN VREG - 7.5V to 36V VPS 4-20 m A VO 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...