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The XTR103 is a monolithic 4-20mA, two-wire current transmitter designed for Platinum RTD temperature 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 a wide 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 +85 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 40 to +85 temperature range.
XTR103 Maximum Ratings
Power Supply, V+ (referenced to IO pin) .......................................... 40V Input Voltage, V+IN , VIN (referenced to IO pin) ..................... 0V to V+ Storage Temperature Range ........................................ 55 to +125 Lead Temperature (soldering, 10s) .............................................. +300 Output Current Limit ............................................................. Continuous Junction Temperature ............................................................... ... +165
XTR103 Features
`LESS THAN ±1% TOTAL ADJUSTEDERROR, 40°C TO +85°C `RTD EXCITATION AND LINEARIZATION `TWO OR THREE-WIRE RTD OPERATION `WIDE SUPPLY RANGE: 9V to 40V `HIGH PSR: 110dB min `HIGH CMR: 80dB min
XTR103 Typical Application
·INDUSTRIAL PROCESS CONTROL ·FACTORY AUTOMATION ·SCADA