SBOS092A – JUNE 1998 – REVISED NOVEMBER 2003
4-20mA CURRENT TRANSMITTER
with Bridge Excitation and Linearization
q LOW TOTAL UNADJUSTED ERROR
q 2.5V, 5V BRIDGE EXCITATION REFERENCE
q 5.1V REGULATOR OUTPUT
q LOW SPAN DRIFT: ±25ppm/°C max
q LOW OFFSET DRIFT: 0.25µV/°C
q HIGH PSR: 110dB min
q HIGH CMR: 86dB min
q WIDE SUPPLY RANGE: 7.5V to 36V
q 14-PIN DIP AND SO-14 SURFACE-MOUNT
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
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 sup-
ply 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 and
SO-14 surface-mount packages and is specified for the
–40°C to +85°C temperature range. Operation is from
–55°C to +125°C.
q PRESSURE BRIDGE TRANSMITTERS
q STRAIN GAGE TRANSMITTERS
q TEMPERATURE BRIDGE TRANSMITTERS
q INDUSTRIAL PROCESS CONTROL
q SCADA REMOTE DATA ACQUISITION
q REMOTE TRANSDUCERS
q WEIGHING SYSTEMS
BRIDGE NONLINEARITY CORRECTION
Bridge Output (mV)
7.5V to 36V
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of Texas Instruments
standard warranty. Production processing does not necessarily include
testing of all parameters.
Copyright © 1998-2003, Texas Instruments Incorporated