Texas Instruments XTR103BU

4-20mA Current Transmitter with RTD Excitation And Linearization 16-SOIC

Instrumentation Amplifier, 1 Func, 2500uV Offset-Max, PDSO16

IC 2-WIRE I-TRANSMITTER 16-SOIC

The XTR103 is a monolithic 4-20mA, two-wire current transmitter designed for Platinum RTD tem-perature sensors. It provides complete RTD current excitation, instrumentation amplifier, linearization, 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 awide range of temperature measurements. Total adjusted error of the complete current transmitter,including the linearized RTD is less than +-1% over the full -40 to +85oC operating temperature range. This includes zero drift, span drift and nonlinearity. The XTR103 operates on loop power supply voltages down to 9V. The XTR103 is available in 16-pin plastic DIP and Sol-16 surface-mount packages specified for the -40oC to +85oC temperature range.