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PDF XTR105 Data sheet ( Hoja de datos )
| Número de pieza | XTR105 | |
| Descripción | 4-20mA CURRENT TRANSMITTER with Sensor Excitation and Linearization | |
| Fabricantes | Burr-Brown Corporation | |
| Logotipo |  |
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®
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
®
1 page  
TYPICAL PERFORMANCE CURVES (CONT)
At TA = +25°C, V+ = 24V, unless otherwise noted.
INPUT VOLTAGE AND CURRENT
NOISE DENSITY vs FREQUENCY
10k 10k
1k 1k
Current Noise
100 100
10
1
Voltage Noise
10
10 100 1k 10k 100k
Frequency (Hz)
ZERO OUTPUT AND REFERENCE
CURRENT NOISE vs FREQUENCY
10k
Zero Output Current
1k
100
10
1
Reference Current
10 100 1k 10k 100k
Frequency (Hz)
INPUT BIAS AND OFFSET CURRENT
vs TEMPERATURE
25
20
15 +IB
10
5
0
–75 –50 –25
0
25 50
Temperature (°C)
–IB
IOS
75 100 125
4
2
0
–2
–4
–6
–8
–10
–12
–75
ZERO OUTPUT CURRENT ERROR
vs TEMPERATURE
–50 –25 0 25 50
Temperature (°C)
75 100
125
INPUT OFFSET VOLTAGE DRIFT
PRODUCTION DISTRIBUTION
50
Typical Production Distribution
45 of Packaged Units.
40
35
30
25
20
15
10
5
0.1%
0.02%
0
Input Offset Voltage Drift (µV/°C)
ZERO OUTPUT DRIFT
PRODUCTION DISTRIBUTION
40
Typical Production Distribution
35 of Packaged Units.
30
25
20
15
10
5
0
Zero Output Drift (µA/°C)
®
5 XTR105
5 Page 
SAMPLE ERROR CALCULATION
RTD value at 4mA Output (RRTD MIN)
RTD Measurement Range
Ambient Temperature Range (∆TA)
Supply Voltage Change (∆V+)
Common-Mode Voltage Change (∆CM)
100Ω
200°C
20°C
5V
0.1V
ERROR SOURCE
INPUT
Input Offset Voltage
vs Common-Mode
Input Bias Current
Input Offset Current
EXCITATION
Current Reference Accuracy
vs Supply
Current Reference Matching
vs Supply
GAIN
Span
Nonlinearity
OUTPUT
Zero Output
vs Supply
DRIFT (∆TA = 20°C)
Input Offset Voltage
Input Bias Current (typical)
Input Offset Current (typical)
Current Reference Accuracy
Current Reference Matching
Span
Zero Output
NOISE (0.1 to 10Hz, typ)
Input Offset Voltage
Current Reference
Zero Output
ERROR EQUATION
VOS/(VIN MAX) • 106
CMRR • ∆CM/(VIN MAX) • 106
IB/IREF • 106
IOS • RRTD MIN/(VIN MAX) • 106
IREF Accuracy (%)/100% • 106
(IREF vs V+) • ∆V+
IREF Matching (%)/100% • 800µA •
RRTD MIN/(VIN MAX) • 106
(IREF matching vs V+) • ∆V+ •
RRTD MIN/(VIN MAX)
Span Error (%)/100% • 106
Nonlinearity (%)/100% • 106
(IZERO - 4mA)/16000µA • 106
(IZERO vs V+) • ∆V+/16000µA • 106
Drift • ∆TA/(VIN MAX) • 106
Drift • ∆TA/800µA • 106
Drift • ∆TA • RRTD MIN/(VIN MAX) • 106
Drift • ∆TA
Drift • ∆TA • 800µA • RRTD MIN/(VIN MAX)
Drift • ∆TA
Drift • ∆TA/16000µA • 106
vn/(VIN MAX) • 106
IREF Noise • RRTD MIN/(VIN MAX) • 106
IZERO Noise/16000µA • 106
SAMPLE
ERROR CALCULATION(1)
100µV/(800µA • 0.38Ω/°C • 200°C) • 106
50µV/V • 0.1V/(800µA • 0.38Ω/°C • 200°C) • 106
0.025µA/800µA • 106
3nA • 100Ω/(800µA • 0.38Ω/°C • 200°C) • 106
Total Input Error:
0.2%/100% • 106
25ppm/V • 5V
0.1%/100% • 800µA • 100Ω/(800µA • 0.38Ω/°C • 200°C) • 106
10ppm/V • 5V • 800µA • 100Ω/(800µA • 0.38Ω/°C • 200°C)
Total Excitation Error:
0.2%/100% • 106
0.01%/100% • 106
Total Gain Error:
25µA/16000µA • 106
0.2µA/V • 5V/16000µA • 106
Total Output Error:
1.5µV/°C • 20°C/(800µA • 0.38Ω/°C • 200°C) • 106
20pA/°C • 20°C/800µA • 106
5pA/°C • 20°C • 100W/(800µA • 0.38Ω/°C • 200°C) • 106
35ppm/°C • 20°C
15ppm/°C • 20°C • 800µA • 100Ω/(800µA • 0.38Ω/°C • 200°C)
25ppm/°C • 20°C
0.5µA/°C • 20°C/16000µA • 106
Total Drift Error:
0.6µV/(800µA • 0.38Ω/°C • 200°C) • 106
3nA • 100Ω/(800µA • 0.38Ω/°C • 200°C) • 106
0.03µA/16000µA • 106
Total Noise Error:
TOTAL ERROR:
NOTE (1): All errors are min/max and referred to input unless otherwise stated.
ERROR
(ppmofFullScale)
UNADJ. ADJUST.
1645
82
31
5
1763
2000
125
1316
66
3507
2000
100
2100
1563
63
1626
493
0.5
0.2
700
395
500
626
2715
10
5
2
17
11728
(1.17%)
0
82
0
0
82
0
125
0
66
191
0
100
100
0
63
63
493
0.5
0.2
700
395
500
626
2715
10
5
2
17
3168
(0.32%)
TABLE II. Error Calculation.
®
11 XTR105
11 Page | ||
| Páginas | Total 15 Páginas | |
| PDF Descargar | [ Datasheet XTR105.PDF ] | |
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