XTR104 Datasheet | Burr-Brown

FEATURES q LESS THAN ±1% TOTAL ADJUSTED ERROR, - 40°C TO +85°C q BRIDGE EXCITATION AND LINEARIZATION q WIDE SUPPLY RANGE: 9V to 40V q LOW SPAN DRIFT: 50ppm/°C max q HIGH PSR: 110d B min q HIGH CMR: 80d B min BRIDGE NONLINEARITY CORRECTION USING XTR104 2.0 Uncorrected Bridge Output 1.5 Nonlinearity (%) APPLICATIONS q INDUSTRIAL PROCESS CONTROL q FACTORY AUTOMATION q SCADA q WEIGHTING SYSTEMS q ACCELEROMETERS DESCRIPTION The XTR104 is a monolithic 4-20m A, two-wire current transmitter integrated circuit designed for bridge input signals. It provides plete bridge excitation, instrumentation amplifier, linearization, and current output circuitry necessary for high impedance strain gage sensors. The instrumentation amplifier can be used over a wide range of gain, acmodating a variety of input signals and sensors. Total adjusted error of the plete current transmitter, including the linearized bridge is less than ±1% over the full - 40°C to +85°C temperature range. This includes zero drift, span drift and non-linearity for bridge outputs as low as 10m V. The XTR104 operates on loop power supply voltages down to 9V. Linearization circuitry consists of a second, fully independent instrumentation amplifier that controls the bridge excitation voltage. It provides second-order correction to the transfer function, typically achieving a 20:1 improvement in nonlinearity, even with low cost transducers. The XTR104 is available in 16-pin plastic DIP and SOL-16 surface-mount packages specified for the - 40°C to +85°C temperature range. 0.5 Corrected 0 - 0.5 0m V 5m V Bridge Output 10m V + R LIN 9V to 40V VPS 4-20 m A VO RL - International Airport Industrial Park - Mailing Address: PO Box 11400 - Tucson, AZ 85734 - Street Address: 6730 S. Tucson Blvd. - Tucson, AZ 85706 Tel: (520) 746-1111 - Twx: 910-952-1111 - Cable: BBRCORP - Telex: 066-6491 - FAX: (520) 889-1510 - Immediate Product Info: (800) 548-6132 ® © 1992 Burr-Brown Corporation PDS-1146B 1 Printed in U.S.A....