XTR106 Linearization Datasheet

XTR106 Datasheet, PDF, Equivalent


Part Number

XTR106

Description

4-20mA CURRENT TRANSMITTER with Bridge Excitation and Linearization

Manufacture

Burr-Brown Corporation

Total Page 15 Pages
Datasheet
Download XTR106 Datasheet


XTR106
® XTR106
XTR106
XTR106
4-20mA CURRENT TRANSMITTER
with Bridge Excitation and Linearization
FEATURES
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
DESCRIPTION
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
VREG pin.
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.
APPLICATIONS
q PRESSURE BRIDGE TRANSMITTER
q STRAIN GAGE TRANSMITTER
q TEMPERATURE BRIDGE TRANSMITTER
q INDUSTRIAL PROCESS CONTROL
q SCADA REMOTE DATA ACQUISITION
q REMOTE TRANSDUCERS
q WEIGHING SYSTEMS
q ACCELEROMETERS
BRIDGE NONLINEARITY CORRECTION
USING XTR106
2.0
Uncorrected
Bridge Output
1.5
1.0
0.5
Corrected
0
–0.5
0mV
5mV
Bridge Output
10mV
VREF5
VREG (5.1V)
VREF 2.5V
RLIN
+ 7.5V to 36V
VPS
4-20mA
5V RG XTR106
VO
RL
IRET
Lin
Polarity
IOUT
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
©1998 Burr-Brown Corporation
PDS-1449A
Printed in U.S.A. June, 1998

XTR106
SPECIFICATIONS
At TA = +25°C, V+ = 24V, and TIP29C external transistor, unless otherwise noted.
XTR106P, U
XTR106PA, UA
PARAMETER
CONDITIONS
MIN
TYP
MAX
MIN
TYP MAX
UNITS
OUTPUT
Output Current Equation
Output Current, Specified Range
Over-Scale Limit
Under-Scale Limit
IO
IOVER
IUNDER
ZERO OUTPUT(1)
Initial Error
vs Temperature
vs Supply Voltage, V+
vs Common-Mode Voltage (CMRR)
vs VREG (IO)
Noise: 0.1Hz to 10Hz
SPAN
Span Equation (Transconductance)
Untrimmed Error
vs Temperature(2)
Nonlinearity: Ideal Input (3)
IZERO
in
S
INPUT(4)
Offset Voltage
vs Temperature
vs Supply Voltage, V+
vs Common-Mode Voltage, RTI
Common-Mode Range(5)
Input Bias Current
vs Temperature
Input Offset Current
vs Temperature
Impedance: Differential
Common-Mode
Noise: 0.1Hz to 10Hz
VOLTAGE REFERENCES(5)
VOS
CMRR
VCM
IB
IOS
ZIN
Vn
Initial: 2.5V Reference
5V Reference
Accuracy
vs Temperature
vs Supply Voltage, V+
vs Load
Noise: 0.1Hz to 10Hz
VREG(5)
Accuracy
vs Temperature
vs Supply Voltage, V+
Output Current
Output Impedance
LINEARIZATION(6)
RLIN (external) Equation
KLIN Linearization Factor
VREF2.5
VREF5
VREG
IREG
RLIN
KLIN
Accuracy
vs Temperature
Max Correctable Sensor Nonlinearity
B
POWER SUPPLY
Specified
Voltage Range
TEMPERATURE RANGE
Specification
Operating
Storage
Thermal Resistance
14-Pin DIP
SO-14 Surface Mount
V+
θJA
IREG = 0, IREF = 0
IREF + IREG = 2.5mA
VIN = 0V, RG =
TA = –40°C to +85°C
V+ = 7.5V to 36V
VCM = 1.1V to 3.5V(5)
Full Scale (VIN) = 50mV
TA = –40°C to +85°C
Full Scale (VIN) = 50mV
VCM = 2.5V
TA = –40°C to +85°C
V+ = 7.5V to 36V
VCM = 1.1V to 3.5V(5)
TA = –40°C to +85°C
TA = –40°C to +85°C
Lin Polarity Connected
to VREG, RLIN = 0
VREF = 2.5V or 5V
TA = –40°C to +85°C
V+ = 7.5V to 36V
IREF = 0mA to 2.5mA
TA = –40°C to +85°C
V+ = 7.5V to 36V
IREG = 0mA to 2.5mA
VREF = 5V
VREF = 2.5V
TA = –40°C to +85°C
VREF = 5V
VREF = 2.5V
IO = VIN • (40/RG) + 4mA, VIN in Volts, RG in
4 20 T
24 28 30
T
T
1 1.6 2.2 T
T
2.9 3.4
4
T
T
4
±5
±0.07
0.04
0.02
0.8
0.035
±25
±0.9
0.2
T
T
T
T
T
T
T
S = 40/RG
±0.05
±3
±0.001
±0.2
±25
±0.01
T
T
T
T
±50 ±100
±0.25
±1.5
±0.1
±3
±10 ±50
1.1 3.5
5 25
20
±0.2
±3
5
0.1 || 1
5 || 10
0.6
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
±50
T
T
±0.4
T
T
±250
±3
T
±100
T
50
±10
A
mA
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
2.5
5
±0.05
±20
±5
60
10
±0.25
±35
±20
5.1
±0.02
±0.1
±0.3
1
See Typical Curves
80
T
T
T ±0.5
T ±75
TT
T
T
T
TT
T
T
T
T
RLIN
=
KLIN
1
4B
– 2B
,
KLIN
in
,
B
is
nonlinearity
relative
to
VFS
6.645
9.905
±1
±50
±5
–2.5, +5
±5
±100
T
T
TT
TT
T
T
+24
+7.5
+36
T
T
T
–40 +85 T
–55
+125
T
–55
+125
T
80
100
T
T
T
T
T
V
V
%
ppm/°C
ppm/V
ppm/mA
µVp-p
V
V
mV/°C
mV/V
mA
k
k
%
ppm/°C
% of VFS
% of VFS
V
V
°C
°C
°C
°C/W
°C/W
T Specification same as XTR106P, XTR106U.
NOTES: (1) Describes accuracy of the 4mA low-scale offset current. Does not include input amplifier effects. Can be trimmed to zero. (2) Does not include initial
error or TCR of gain-setting resistor, RG. (3) Increasing the full-scale input range improves nonlinearity. (4) Does not include Zero Output initial error. (5) Voltage
measured with respect to IRET pin. (6) See “Linearization” text for detailed explanation. VFS = full-scale VIN.
®
XTR106
2


Features ® XTR 106 XTR106 XTR 106 4-20mA C URRENT TRANSMITTER with Bridge Excitati on and Linearization FEATURES q LOW TOT AL UNADJUSTED ERROR q 2.5V, 5V BRIDGE E XCITATION REFERENCE q 5.1V REGULATOR OU TPUT 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 W IDE SUPPLY RANGE: 7.5V to 36V q 14-PIN DIP AND SO-14 SURFACE-MOUNT APPLICATIO NS q PRESSURE BRIDGE TRANSMITTER q STRA IN GAGE TRANSMITTER q TEMPERATURE BRIDG E TRANSMITTER q INDUSTRIAL PROCESS CONT ROL q SCADA REMOTE DATA ACQUISITION q R EMOTE TRANSDUCERS q WEIGHING SYSTEMS q ACCELEROMETERS BRIDGE NONLINEARITY CORR ECTION USING XTR106 2.0 Uncorrected Bri dge Output 1.5 DESCRIPTION The XTR106 is a low cost, monolithic 4-20mA, twowi re current transmitter designed for bri dge sensors. It provides complete bridg e excitation (2.5V or 5V reference), in strumentation amplifier, sensor lineari zation, and current output circuitry. C urrent for powering additional external input circuitry is available.
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