Datasheet Texas Instruments XTR105TDC1

XTR105-DIE
www.ti.com SBOS648 – AUGUST 2012 4-20mA CURRENT TRANSMITTER WITH SENSOR EXCITATION AND LINEARIZATION
FEATURES 1 APPLICATIONS Low Unadjusted Error
Two Precision Current Sources
Linearization
2-or 3-Wire RTD Operation
Low Offset Drift
Low Output Current Noise
High PSR
High CMR
Wide Supply Range Industrial Process Control
Factory Automation
SCADA Remote Data Acquisition
Remote Temperature and Pressure
Transducers DESCRIPTION
The XTR105 is a monolithic 4-20mA, 2-wire current transmitter with two precision current sources. It provides
complete 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 complete 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 …