XTR104 LINEARIZATION Datasheet

XTR104 Datasheet, PDF, Equivalent


Part Number

XTR104

Description

4-20mA Current Transmitter with BRIDGE EXCITATION AND LINEARIZATION

Manufacture

Burr-Brown Corporation

Total Page 11 Pages
Datasheet
Download XTR104 Datasheet


XTR104
® XTR104
4-20mA Current Transmitter with
BRIDGE EXCITATION AND LINEARIZATION
FEATURES
q LESS THAN ±1% TOTAL ADJUSTED
ERROR, –40°C TO +85°C
q BRIDGE EXCITATION AND LINEARIZATION
q WIDE SUPPLY RANGE: 9V to 40V
q LOW SPAN DRIFT: 50ppm/°C max
q HIGH PSR: 110dB min
q HIGH CMR: 80dB min
DESCRIPTION
The XTR104 is a monolithic 4-20mA, two-wire cur-
rent transmitter integrated circuit designed for bridge
input signals. It provides complete bridge excitation,
instrumentation amplifier, linearization, and current
output circuitry necessary for high impedance strain
gage sensors.
The instrumentation amplifier can be used over a wide
range of gain, accommodating a variety of input signals
and sensors. Total adjusted error of the complete current
transmitter, including the linearized bridge is less than
±1% over the full –40°C to +85°C temperature range.
This includes zero drift, span drift and non-linearity for
bridge outputs as low as 10mV. The XTR104 operates
on loop power supply voltages down to 9V.
Linearization circuitry consists of a second, fully inde-
pendent instrumentation amplifier that controls the bridge
excitation voltage. It provides second-order correction
to the transfer function, typically achieving a 20:1
improvement in nonlinearity, even with low cost trans-
ducers.
The XTR104 is available in 16-pin plastic DIP and
SOL-16 surface-mount packages specified for the
–40°C to +85°C temperature range.
APPLICATIONS
q INDUSTRIAL PROCESS CONTROL
q FACTORY AUTOMATION
q SCADA
q WEIGHTING SYSTEMS
q ACCELEROMETERS
BRIDGE NONLINEARITY CORRECTION
USING XTR104
2.0
Uncorrected
Bridge Output
1.5
1.0
0.5
0
–0.5
0mV
Corrected
5mV
Bridge Output
10mV
R LIN
+ 9V to 40V
VPS
RG XTR104
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 • Cable: BBRCORP • Telex: 066-6491 • FAX: (520) 889-1510 • Immediate Product Info: (800) 548-6132
©1992 Burr-Brown Corporation
PDS1-1146B
XTR104Printed in U.S.A. September, 1993
®

XTR104
SPECIFICATIONS
TA = +25°C, V+ = 24V, and 2N6121 external transistor, unless otherwise noted.
XTR104BP, BU
XTR104AP, AU
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP
MAX
OUTPUT
Output Current Equation
Total Adjusted Error (1)
Current, Specified Range
Over-Scale Limit
Under Scale-Limit
Full Scale Output Error
Noise: 0.1Hz to 1kHz
TMIN to TMAX, VFS 10mV, RB = 5k
VIN = 1V, RG =
RG = 40
ZERO OUTPUT(2)
Initial Error
vs Temperature
vs Supply Voltage, V+
vs Common-Mode Voltage
VIN = 0V, RG =
V+ = 9V to 40V(3)
VCM = 2V to 3V(3)
SPAN
Span Equation (Transconductance)
Untrimmed Error
vs Temperature(4)
Nonlinearity: Ideal Input
Bridge Input(5)
RG 75
IO = VIN • (0.016 + 40/RG) + 4mA
±1
VIN in Volts, RG in
±2
4 20 * *
34 40
**
3.6 3.8
**
±15 ±50
* ±100
8*
4
±5 ±50
±0.2
±0.5
0.5 2
0.1 2
*
* ±100
* ±1
**
**
S = 0.016 + 40/RG
±0.1
±1
±20 ±50
0.01
0.1
*
**
* ±100
*
*
INPUT
Differential Range
Input Voltage Range(3)
Common-Mode Rejection
Impedance: Differential
Common-Mode
Offset Voltage
vs Temperature
vs Supply Voltage, V+
Input Bias Current
vs Temperature
Input Offset Current
vs Temperature
VIN = 2V to 3V(3)
V+ = 9V to 40V(3)
1
23
80 100
3
0.5
±0.5
±2.5
1 2.5
110 130
100 250
0.1 2
2 20
0.01
0.25
*
*
*
*
*
*
*
*
**
25
*
**
**
**
**
VOLTAGE REFERENCE(6)
Voltage
Accuracy
vs Temperature
vs Supply Voltage, V+
vs Load
POWER SUPPLY
Voltage Range(3), V+
V+ = 9V to 40V(3)
IL = 0 to 2mA
5
±0.25
±10
5
50
±0.5
±50
9 40
*
*
* ±1
* ±100
*
*
*
TEMPERATURE RANGE
Specification
Operating
θJA
(TMIN to TMAX)
Derated Performance
–40 85
–40 125
80
*
*
*
*
*
UNITS
A
% of FS
mA
mA
mA
µA
µAp-p
mA
µA
µA/°C
µA/V
µA/V
A/V
%
ppm/°C
%
%
V
V
dB
G
G
mV
µV/°C
dB
nA
nA/°C
nA
nA/°C
V
%
ppm/°C
ppm/V
ppm/mA
V
°C
°C
°C/W
* Specification same as XTR104BP.
NOTES: (1) Includes corrected second-order nonlinearity of bridge, and over-temperature zero and span effects. Does not include initial offset and span errors which
are normally trimmed to zero at 25°C. (2) Describes accuracy of the 4mA low-scale current. Does not include input amplifier effects. Can be trimmed to zero.
(3) Voltage measured with respect to IO pin. (4) Does not include TCR of gain-setting resistor, RG. (5) When configured to correct for 2% second-order bridge sensor
nonlinearity. (6) Measured with RLIN = to disable linearization feature.
®
XTR104
2


Features ® XTR104 4-20mA Current Transmitter w ith BRIDGE EXCITATION AND LINEARIZATION FEATURES q LESS THAN ±1% TOTAL ADJUST ED ERROR, –40°C TO +85°C q BRIDGE E XCITATION AND LINEARIZATION q WIDE SUPP LY RANGE: 9V to 40V q LOW SPAN DRIFT: 5 0ppm/°C max q HIGH PSR: 110dB min q HI GH CMR: 80dB min BRIDGE NONLINEARITY CO RRECTION USING XTR104 2.0 Uncorrected B ridge Output 1.5 Nonlinearity (%) APPL ICATIONS q INDUSTRIAL PROCESS CONTROL q FACTORY AUTOMATION q SCADA q WEIGHTING SYSTEMS q ACCELEROMETERS DESCRIPTION The XTR104 is a monolithic 4-20mA, two- wire current transmitter integrated cir cuit designed for bridge input signals. It provides complete bridge excitation , instrumentation amplifier, linearizat ion, and current output circuitry neces sary for high impedance strain gage sen sors. The instrumentation amplifier can be used over a wide range of gain, acc ommodating a variety of input signals a nd sensors. Total adjusted error of the complete current transmitter, including the linearized bridge is less.
Keywords XTR104, datasheet, pdf, Burr-Brown Corporation, 4-20mA, Current, Transmitter, with, BRIDGE, EXCITATION, AND, LINEARIZATION, TR104, R104, 104, XTR10, XTR1, XTR, Equivalent, stock, pinout, distributor, price, schematic, inventory, databook, Electronic, Components, Parameters, parts, cross reference, chip, Semiconductor, circuit, Electric, manual, substitute




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