Burr Brown XTR103BU-1K, XTR103BU, XTR103BP, XTR103AU-1K, XTR103AU Datasheet

©

1992 Burr-Brown Corporation PDS-1145E Printed in U.S.A. October, 1993

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–200°C

Pt100 NONLINEARITY CORRECTION

USING XTR103

Process Temperature (°C)

+850°C

5

4

3

2

1

0

–1

Uncorrected

RTD Nonlinearity

Corrected

Nonlinearity

Nonlinearity (%)

XTR103

4-20mA Current Transmitter with

RTD EXCITATION AND LINEARIZATION

FEATURES

● LESS THAN ±1% TOTAL ADJUSTED

ERROR, –40

°C TO +85°C

● RTD EXCITATION AND LINEARIZATION

● TWO OR THREE-WIRE RTD OPERATION

● WIDE SUPPLY RANGE: 9V to 40V

● HIGH PSR: 110dB min

● HIGH CMR: 80dB min

APPLICATIONS

● INDUSTRIAL PROCESS CONTROL

● FACTORY AUTOMATION

● SCADA

DESCRIPTION

The XTR103 is a monolithic 4-20mA, two-wire
current transmitter designed for Platinum RTD tem­perature sensors. It provides complete RTD current
excitation, instrumentation amplifier, linearization, 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 measurements. Total
adjusted error of the complete current transmitter,
including the linearized RTD is less than ±1% over the
full –40 to +85°C operating temperature range. This
includes zero drift, span drift and nonlinearity. The
XTR103 operates on loop power supply voltages down
to 9V.

The XTR103 is available in 16-pin plastic DIP and
SOL-16 surface-mount packages specified for the
–40°C to +85°C temperature range.

RTD

XTR103

–

R

L

4-20 mA

V

PS

+

9 to 40V

IR = 0.8mA
IR = 0.8mA

V

O

R

LIN

R

G

®

XTR103

XTR103

2

®

XTR103

✻ Specification same as XTR103BP.
NOTES: (1) Includes corrected Pt100 nonlinearity for process measurement spans greater than 100°C, and over-temperature zero and span effects. Does not include

initial offset and gain errors which are normally trimmed to zero at 25°C. (2) Describes accuracy of the 4mA low-scale offset current. Does not include input amplifier
effects. Can be trimmed to zero. (3) Voltage measured with respect to I

O

pin. (4) Does not include TCR of gain-setting resistor, RG. (5) Measured with R

LIN

= ∞ to

disable linearization feature.

IO = VIN • (0.016 + 40/RG) + 4mA, VIN in Volts, RG in Ω

SPECIFICATIONS

ELECTRICAL

At TA = +25°C, V+ = 24V, and 2N6121 external transistor, unless otherwise noted.

XTR103BP/BU XTR103AP/AU
PARAMETER CONDITIONS MIN TYP MAX MIN TYP MAX UNITS
OUTPUT

Output Current Equation A
Total Adjusted Error

(1)

T

MIN

to T

MAX

±1 ±2 % of FS
Output Current, Specified Range 4 20 ✻✻mA
Over-Scale Limit 34 40 ✻✻ mA
Under Scale-Limit 3.6 3.8 ✻✻ mA
Full Scale Output Error V

IN

= 1V, RG = ∞±15 ±50 ✻ ±100 µA

Noise: 0.1Hz to 1kHz R

G

= 40Ω 8 ✻ µAp-p

ZERO OUTPUT

(2)

VIN = 0, RG = ∞ 4 ✻ mA

Initial Error ±5 ±50 ✻ ±100 µA

vs Temperature ±0.2 ±0.5 ✻ ±1 µA/°C
vs Supply Voltage, V+ V+ = 9V to 40V

(3)

0.5 2 ✻✻ µA/V

vs Common-Mode Voltage V

CM

= 2V to 4V

(3)

0.1 2 ✻✻ µA/V

SPAN

Span Equation (Transconductance) S = 0.016 + 40/R

G

✻ A/V

Untrimmed Error R

G

≥ 75Ω±0.1 ±1 ✻✻ %

vs Temperature

(4)

±20 ±50 ✻ ±100 ppm/°C

Nonlinearity: Ideal Input 0.01 ✻ %

RTD Input Pt100: –200°C to +850°C 0.1 ✻ %

R

LIN

= 1127Ω

INPUT

Differential Range R

G

= ∞ 1 ✻ V

Input Voltage Range

(3)

24✻✻V

Common-Mode Rejection V

IN

= 2V to 4V

(3)

80 100 ✻✻ dB

Impedance: Differential 3 ✻ GΩ

Common-Mode 0.5 ✻ GΩ

Offset Voltage ±0.5 ±2.5 ✻✻ mV

vs Temperature ±1 ±2.5 ±2 ±5 µV/°C
vs Supply Voltage, V+ V+ = 9V to 40V

(3)

110 130 ✻✻ dB

Input Bias Current 100 250 ✻✻ nA

vs Temperature 0.1 2 ✻✻ nA/°C

Input Offset Current 2 20 ✻✻ nA

vs Temperature 0.01 0.25 ✻✻ nA/°C

CURRENT SOURCES

(5)

Current 0.8 ✻ mA
Accuracy ±0.25 ±0.5 ✻ ±1%

vs Temperature ±25 ±50 ±50 ±100 ppm/°C
vs Power Supply, V+ V+ = 9V to 40V

(3)

50 ✻ ppm/V

Compliance Voltage

(3)

(V

–

IN

) – 0.2 (V+) – 5 ✻✻V

Matching ±0.5 ✻ %

vs Temperature ±10 ±25 ✻ ±50 ppm/°C
vs Power Supply, V+ V+ = 9V to 40V

(3)

10 ✻ ppm/V

POWER SUPPLY

Voltage Range

(3)

, V+ 9 40 ✻✻V

TEMPERATURE RANGE

Specification, T

MIN

to T

MAX

–40 85 ✻✻°C

Operating –40 125 ✻✻°C

θ

JA

80 ✻ °C/W

XTR1033

®

PIN CONFIGURATION

Power Supply, V+ (referenced to IO pin) .......................................... 40V

Input Voltage, V

+

IN

, V

–

IN

(referenced to IO pin) ........................ 0V to V+

Storage Temperature Range ........................................ –55°C to +125°C

Lead Temperature (soldering, 10s).............................................. +300°C

Output Current Limit ............................................................... Continuous

Junction Temperature ................................................................... +165°C

ABSOLUTE MAXIMUM RATINGS

Zero Adjust
Zero Adjust

V

IN

V

IN

R

G

R

G

I

O

R

LIN

Zero Adjust
B (Base)
E

INT

(Internal Emitter)

I

R2

I

R1

E (Emitter)
V+
R

LIN

1
2
3
4
5
6
7
8

16
15
14
13
12
11
10

9

–

+

ELECTROSTATIC
DISCHARGE SENSITIVITY

This integrated circuit can be damaged by ESD. Burr-Brown
recommends that all integrated circuits be handled with
appropriate precautions. Failure to observe proper handling
and installation procedures can cause damage.

ESD damage can range from subtle performance degradation
to complete device failure. Precision integrated circuits may
be more susceptible to damage because very small parametric
changes could cause the device not to meet its published
specifications.

TOP VIEW

The information provided herein is believed to be reliable; however, BURR-BROWN assumes no responsibility for inaccuracies or omissions. BURR-BROWN assumes
no responsibility for the use of this information, and all use of such information shall be entirely at the user’s own risk. Prices and specifications are subject to change
without notice. No patent rights or licenses to any of the circuits described herein are implied or granted to any third party. BURR-BROWN does not authorize or warrant
any BURR-BROWN product for use in life support devices and/or systems.

PACKAGE
DRAWING TEMPERATURE

PRODUCT PACKAGE NUMBER

(1)

RANGE

XTR103AP 16-pin Plastic DIP 180 –40°C to +85°C
XTR103BP 16-pin Plastic DIP 180 –40°C to +85°C
XTR103AU SOL-16 Surface Mount 211 –40°C to +85°C
XTR103BU SOL-16 Surface Mount 211 –40°C to +85°C

NOTE: (1) For detailed drawing and dimension table, please see end of data
sheet, or Appendix C of Burr-Brown IC Data Book.

PACKAGE/ORDERING INFORMATION