®
XTR101
Precision, Low Drift
4-20mA TWO-WIRE TRANSMITTER
FEATURES
q
INSTRUMENTATION AMPLIFIER INPUT
Low Offset Voltage, 30
µ
V max
Low Voltage Drift, 0.75
µ
V/
°
C max
Low Nonlinearity, 0.01% max
q
TRUE TWO-WIRE OPERATION
Power and Signal on One Wire Pair
Current Mode Signal Transmission
High Noise Immunity
q
DUAL MATCHED CURRENT SOURCES
q
WIDE SUPPLY RANGE: 11.6V to 40V
q
–40
°
C to +85
°
C SPECIFICATION RANGE
q
SMALL 14-PIN DIP PACKAGE, CERAMIC
AND PLASTIC
APPLICATIONS
q
INDUSTRIAL PROCESS CONTROL
Pressure Transmitters
Temperature Transmitters
Millivolt Transmitters
q
RESISTANCE BRIDGE INPUTS
q
THERMOCOUPLE INPUTS
q
RTD INPUTS
q
CURRENT SHUNT (mV) INPUTS
q
PRECISION DUAL CURRENT SOURCES
q
AUTOMATED MANUFACTURING
q
POWER/PLANT ENERGY SYSTEM
MONITORING
DESCRIPTION
The XTR101 is a microcircuit, 4-20mA, two-wire
transmitter containing a high accuracy instrumenta-
tion amplifier (IA), a voltage-controlled output current
source, and dual-matched precision current reference.
This combination is ideally suited for remote signal
conditioning of a wide variety of transducers such as
thermocouples, RTDs, thermistors, and strain gauge
bridges. State-of-the-art design and laser-trimming,
wide temperature range operation and small size make
it very suitable for industrial process control applica-
tions. In addition, the optional external transistor al-
lows even higher precision.
The two-wire transmitter allows signal and power to
be supplied on a single wire-pair by modulating the
power supply current with the input signal source. The
transmitter is immune to voltage drops from long runs
and noise from motors, relays, actuators, switches,
transformers, and industrial equipment. It can be used
by OEMs producing transmitter modules or by data
acquisition system manufacturers.
I
REF1
I
REF2
10
e
1
3
–
11
+V
CC
8
Optional
External
Transistor
5
(1)
Span
6
XTR101
12
B
e
2
4
+
(1)
13
1
2
14 7
9
E
I
OUT
Optional
Offset Null
NOTE: (1) Pins 12 and 13 are used for optional BW control.
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
©
1986 Burr-Brown Corporation
PDS-627G
Printed in U.S.A. October, 1993
BURR-BROWN [ BURR-BROWN CORPORATION ]
