XTR105 Datasheet, PDF (1/15 Pages) Burr-Brown (TI) – 4-20mA CURRENT TRANSMITTER with Sensor Excitation and Linearization

®
XTR105
XTR105
XTR105
www.burr-brown.com/databook/XTR105.html
4-20mA CURRENT TRANSMITTER
with Sensor Excitation and Linearization
FEATURES
q LOW UNADJUSTED ERROR
q TWO PRECISION CURRENT SOURCES
800µA EACH
q RTD OR BRIDGE EXCITATION
q LINEARIZATION
q TWO OR THREE-WIRE RTD OPERATION
q LOW OFFSET DRIFT: 0.4µV/°C
q LOW OUTPUT CURRENT NOISE: 30nAp-p
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 SOIC PACKAGES
DESCRIPTION
The XTR105 is a monolithic 4-20mA, two-wire
current transmitter with two precision current sources.
It provides complete current excitation for Platinum
RTD temperature sensors and bridges, instrumenta-
tion amplifier, 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 trans-
mitter is low enough to permit use without adjustment
in many applications. This includes zero output cur-
rent drift, span drift and nonlinearity. The XTR105
operates on loop power supply voltages down to 7.5V.
The XTR105 is available in 14-pin plastic DIP and
SO-14 surface-mount packages and is specified for the
–40°C to +85°C industrial temperature range.
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q FACTORY AUTOMATION
q SCADA REMOTE DATA ACQUISITION
q REMOTE TEMPERATURE AND PRESSURE
TRANSDUCERS
5
4
3
2
1
0
–1
–200°C
Pt100 NONLINEARITY CORRECTION
USING XTR105
Uncorrected
RTD Nonlinearity
Corrected
Nonlinearity
Process Temperature (°C)
+850°C
I_R = 0.8mA
I_R = 0.8mA
+
V_LIN
V_REG
RTD
R_G
XTR105
–
7.5V to 36V
V_PS
4-20 mA
V_O
R_L
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: [phone] • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: [phone] (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1997 Burr-Brown Corporation}
PDS-1₁362B
®
XTR105 ^{Printed in U.S.A. February, 1997}