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XTR105UA Datasheet(PDF) 1 Page - Texas Instruments

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Part # XTR105UA
Description  4-20mA CURRENT TRANSMITTER with Sensor Excitation and Linearization
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Manufacturer  TI1 [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI1 - Texas Instruments

XTR105UA Datasheet(HTML) 1 Page - Texas Instruments

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background image
RTD
XTR105
4-20 mA
V
PS
V
O
R
L
R
G
V
LIN
V
REG
+
7.5V to 36V
I
R = 0.8mA
I
R = 0.8mA
4-20mA CURRENT TRANSMITTER
with Sensor Excitation and Linearization
FEATURES
q LOW UNADJUSTED ERROR
q TWO PRECISION CURRENT SOURCES: 800
µA each
q LINEARIZATION
q 2- OR 3-WIRE RTD OPERATION
q LOW OFFSET DRIFT: 0.4
µV/°C
q LOW OUTPUT CURRENT NOISE: 30nA
PP
q HIGH PSR: 110dB minimum
q HIGH CMR: 86dB minimum
q WIDE SUPPLY RANGE: 7.5V to 36V
q DIP-14 AND SO-14 PACKAGES
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q FACTORY AUTOMATION
q SCADA REMOTE DATA ACQUISITION
q REMOTE TEMPERATURE AND PRESSURE
TRANSDUCERS
−200°C
Pt100 NONLINEARITY CORRECTION
USING XTR105
Process Temperature (
°C)
+850
°C
5
4
3
2
1
0
−1
Uncorrected
RTD Nonlinearity
Corrected
Nonlinearity
DESCRIPTION
The XTR105 is a monolithic 4-20mA, 2-wire current transmit-
ter with two precision current sources. It provides complete
current excitation for platinum RTD temperature sensors and
bridges, instrumentation amplifiers, and current output cir-
cuitry on a single integrated circuit.
Versatile linearization circuitry provides a 2nd-order correc-
tion 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 un-
adjusted error of the complete current transmitter is low
enough to permit use without adjustment in many applica-
tions. 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 surface-
mount packages and is specified for the –40
°C to +85°C
industrial temperature range.
XTR105
XTR105
XTR105
SBOS061B – FEBRUARY 1997 – REVISED AUGUST 2004
www.ti.com
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 © 1997-2004, Texas Instruments Incorporated
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.


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