XTR105 Texas Instruments pdf datasheet download

XTR105

4-20mA CURRENT TRANSMITTER
with Sensor Excitation and Linearization

FEATURES

LOW UNADJUSTED ERROR
TWO PRECISION CURRENT SOURCES: 800μA each
LINEARIZATION
2- OR 3-WIRE RTD OPERATION
LOW OFFSET DRIFT: 0.4μV/°C
LOW OUTPUT CURRENT NOISE: 30nAPP
HIGH PSR: 110dB minimum
HIGH CMR: 86dB minimum
WIDE SUPPLY RANGE: 7.5V to 36V
DIP-14 AND SO-14 PACKAGES

APPLICATIONS

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 loop power-supply
voltages down to 7.5V.
The XTR105 is available in DIP-14 and SO-14 surfacemount
packages and is specified for the –40°C to +85°C
industrial temperature range.

ABSOLUTE MAXIMUM RATINGS(1)
Power Supply, V+ (referenced to the IO pin) ...................................... 40V
Input Voltage, VIN+, VIN– (referenced to the IO pin) .................... 0V to V+
Storage Temperature Range .........................................–55°C to +125°C
Lead Temperature (soldering, 10s) ............................................... +300°C
Output Current Limit ................................................................ Continuous
Junction Temperature .................................................................... +165°C

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