Texas Instruments XTR106U/2K5

Instrumentation Amplifier, 1 Func, 25uV Offset-Max, PDSO14

Sensor and Detector Interface 36V 2-Wire Interface 14-Pin SOIC T/R

The XTR106 is a low cost, monolithic 4-20mA, two-wire current transmitter designed for bridge sensors. It provides complete bridge excitation (2.5V or 5V refer-ence), instrumentation amplifier, sensor linearization, and current output circuitry. Current for powering ad-ditional external input circuitry is available from the VREG pin. The instrumentation amplifier can be used over a wide range of gain, accommodating a variety of input signal types and sensors. Total unadjusted error of the com-plete current transmitter, including the linearized bridge, is low enough to permit use without adjustment in many applications. The XTR106 operates on loop power supply voltages down to 7.5V. Linearization circuitry provides second-order correction to the transfer function by controlling bridge excitation voltage. It provides up to a 20:1 improvement in nonlinearity, even with low cost transducers. The XTR106 is available in 14-pin plastic DIP ands O-14 surface-mount packages and is specified for the -40oC to +85oC temperature range. Operation is from-55oC to +125 oC.