XTR105 Linearization Datasheet

XTR105 Datasheet, PDF, Equivalent


Part Number

XTR105

Description

4-20mA CURRENT TRANSMITTER with Sensor Excitation and Linearization

Manufacture

Burr-Brown Corporation

Total Page 15 Pages
Datasheet
Download XTR105 Datasheet


XTR105
®
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
IR = 0.8mA
IR = 0.8mA
+
VLIN
VREG
RTD
RG XTR105
7.5V to 36V
VPS
4-20 mA
VO
RL
International Airport Industrial Park • Mailing Address: PO Box 11400, Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd., Tucson, AZ 85706 • Tel: (520) 746-1111 • Twx: 910-952-1111
Internet: http://www.burr-brown.com/ • FAXLine: (800) 548-6133 (US/Canada Only) • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1997 Burr-Brown Corporation
PDS-11362B
XTR105Printed in U.S.A. February, 1997
®

XTR105
SPECIFICATIONS
At TA = +25°C, V+ = 24V, and TIP29C external transistor, unless otherwise noted.
XTR105P, U
XTR105PA, UA
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP MAX
UNITS
OUTPUT
Output Current Equation
Output Current, Specified Range
Over-Scale Limit
Under-Scale Limit
ZERO OUTPUT(1)
Initial Error
vs Temperature
vs Supply Voltage, V+
vs Common-Mode Voltage
vs VREG Output Current
Noise: 0.1Hz to 10Hz
SPAN
Span Equation (Transconductance)
Initial Error (3)
vs Temperature(3)
Nonlinearity: Ideal Input (4)
INPUT(5)
Offset Voltage
vs Temperature
vs Supply Voltage, V+
vs Common-Mode Voltage,
RTI (CMRR)
Common-Mode Input Range(2)
Input Bias Current
vs Temperature
Input Offset Current
vs Temperature
Impedance: Differential
Common-Mode
Noise: 0.1Hz to 10Hz
CURRENT SOURCES
Current
Accuracy
vs Temperature
vs Power Supply, V+
Matching
vs Temperature
vs Power Supply, V+
Compliance Voltage, Positive
Negative(2)
Output Impedance
Noise: 0.1Hz to 10Hz
VREG(2)
Accuracy
vs Temperature
vs Supply Voltage, V+
Output Current
Output Impedance
LINEARIZATION
RLIN (internal)
Accuracy
vs Temperature
POWER SUPPLY
Specified
Voltage Range
TEMPERATURE RANGE
Specification, TMIN to TMAX
Operating
Storage
Thermal Resistance, θJA
14-Pin DIP
SO-14 Surface-Mount
IREG = 0V
VIN = 0V, RG =
V+ = 7.5V to 36V
VCM = 1.25V to 3.5V(2)
Full Scale (VIN) = 50mV
Full Scale (VIN) = 50mV
VCM = 2V
V+ = 7.5V to 36V
VCM = 1.25V to 3.5V(2)
VO = 2V(6)
V+ = 7.5V to 36V
V+ = 7.5V to 36V
IO = VIN • (40/RG) + 4mA, VIN in Volts, RG in
4 20 T
24 27 30 T
T
1.8 2.2 2.6
T
T
4
±5
±0.07
0.04
0.02
0.3
0.03
±25
±0.5
0.2
T
T
T
T
T
T
T
S = 40/RG
±0.05
±3
0.003
±0.2
±25
0.01
T
T
T
T
1.25
±50
±0.4
±0.3
±10
5
20
±0.2
5
0.1 || 1
5 || 10
0.6
±100
±1.5
±3
±50
3.5
25
±3
T
T
T
T
T
T
T
T
T
T
T
T
(V+) –3
0
800
±0.05
±15
±10
±0.02
±3
1
(V+) –2.5
–0.2
150
0.003
5.1
±0.02
±0.2
1
±1
75
±0.2
±35
±25
±0.1
±15
10
±0.1
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
1
±0.2
±0.5
±25 ±100
T
T
T
+24
+7.5
+36
T
T
–40 +85 T
–55
+125
T
–55
+125
T
80
100
T
T
T
T
T
±50
±0.9
T
±0.4
T
T
±250
±3
T
±100
T
50
±10
±0.4
±75
T
±0.2
±30
T
T
±1
T
T
T
T
T
A
mA
mA
mA
mA
µA
µA/°C
µA/V
µA/V
µA/mA
µAp-p
A/V
%
ppm/°C
%
µV
µV/°C
µV/V
µV/V
V
nA
pA/°C
nA
pA/°C
G|| pF
G|| pF
µVp-p
µA
%
ppm/°C
ppm/V
%
ppm/°C
ppm/V
V
V
M
µAp-p
V
V
mV/°C
mV/V
mA
k
%
ppm/°C
V
V
°C
°C
°C
°C/W
°C/W
T Specification same as XTR105P, XTR105U.
NOTES: (1) Describes accuracy of the 4mA low-scale offset current. Does not include input amplifier effects. Can be trimmed to zero. (2) Voltage measured with
respect to IRET pin. (3) Does not include initial error or TCR of gain-setting resistor, RG. (4) Increasing the full-scale input range improves nonlinearity. (5) Does not
include Zero Output initial error. (6) Current source output voltage with respect to IRET pin.
®
2


Features ® XTR 105 XTR105 XTR 105 www.burr -brown.com/databook/XTR105.html 4-20mA CURRENT TRANSMITTER with Sensor Excita tion and Linearization FEATURES q LOW U NADJUSTED ERROR q TWO PRECISION CURRENT SOURCES 800µA EACH q RTD OR BRIDGE EX CITATION 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 Nonlinea rity (%) 5 4 3 2 1 0 –1 –200°C Pro cess Temperature (°C) +850°C APPLICA TIONS q INDUSTRIAL PROCESS CONTROL q FA CTORY AUTOMATION q SCADA REMOTE DATA AC QUISITION q REMOTE TEMPERATURE AND PRES SURE TRANSDUCERS Pt100 NONLINEARITY COR RECTION USING XTR105 q HIGH CMR: 86dB min q WIDE SUPPLY RANGE: 7.5V TO 36V q 14-PIN DIP AND SO-14 SOIC PACKAGES Unc orrected RTD Nonlinearity DESCRIPTION The XTR105 is a monolithic 4-20mA, two- wire current transmitter with two preci sion current sources. It provides compl ete current excitation for Platinum RTD temperature sensors and bridges, instrumentation amplifier, and current o.
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