XTR501 Datasheet, PDF (1/7 Pages) Burr-Brown (TI) – HIGH CURRENT BRIDGE DRIVER and 4-20mA Transmitter

®
XTR501
HIGH CURRENT BRIDGE DRIVER
and 4-20mA Transmitter
FEATURES
q SENSOR EXCITATION OF 1W
q VARIABLE EXCITATION VOLTAGE:
1.5V to 5.0V
q SINGLE SUPPLY: 11.4V to 30VDC
q INRUSH CURRENT LIMITING
q 4-20mA TRANSMITTER
APPLICATIONS
q GAS DETECTION SENSORS
q PELLISTOR CATALYTIC DETECTORS
q STRAIN GAGES
q HIGH CURRENT BRIDGES
q LOAD CELLS
q HOT-WIRE ANEMOMETERS
DESCRIPTION
The XTR501 contains a high efficiency DC/DC con-
verter and 4-20mA three wire current transmitter. It
provides regulated bridge excitation, optional half
bridge, differential inputs and current transmitter nec-
essary for the excitation and signal conditioning of
low impedance bridge sensors and high integrity sig-
nal transmission.
The DC/DC converter is capable of supplying 1W into
a regulated bridge voltage of 1.5V to 5.0V from a
supply of 11.4V to 30V. The combination of a low
startup current and high efficiency current step-up
allows for a combined supply line resistance of up to
100Ω when exciting low impedance sensors.
The instrumentation amplifier of the current transmit-
ter can be used over a wide range of gains, accommo-
dating a variety of input signals and sensors.
The XTR501 is particularly suited to excitation of
high current/low impedance sensors used in bridge
applications allowing the use of lighter cabling lead-
ing to considerable savings on cabling costs.
+V_IN
XTR501
–V_IN
V_BB
+V_B
R_SPAN
G_A
G_B
+24V
+V_S
Long Cables
DC/DC
I_{OUT 4-20mA}
V_OUT
R_SENSE
Com
V_BSET
R_SET
International Airport Industrial Park • Mailing Address: PO Box 11400 • Tucson, AZ 85734 • Street Address: 6730 S. Tucson Blvd. • Tucson, AZ 85706
Tel: [phone] • Twx: 910-952-1111 • Cable: BBRCORP • Telex: 066-6491 • FAX: [phone] • Immediate Product Info: [phone]
©_{1994 Burr-Brown Corporation}
PDS-1212
Printed in U.S.A. October, 1994