XTR117
SBOS344 鈭?SEPTEMBER 2005
4-20mA Current-Loop Transmitter
FEATURES
D
D
D
D
D
D
LOW QUIESCENT CURRENT: 130碌A(chǔ)
5V REGULATOR FOR EXTERNAL CIRCUITS
LOW SPAN ERROR: 0.05%
LOW NONLINEARITY ERROR: 0.003%
WIDE-LOOP SUPPLY RANGE: 7.5V to 40V
MSOP-8 PACKAGE
DESCRIPTION
The XTR117 is a precision current output converter designed
to transmit analog 4-20mA signals over an industry- standard
current loop. It provides accurate current scaling and output
current limit functions.
The on-chip voltage regulator (5V) can be used to power
external circuitry. A current return pin (I
RET
) senses any
current used in external circuitry to assure an accurate
control of the output current.
The XTR117 is a fundamental building block of smart
sensors using 4-20mA current transmission. The XTR117 is
specified for operation over the extended industrial
temperature range, 鈭?0擄C to +125擄C.
APPLICATIONS
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2-WIRE, 4-20mA CURRENT LOOP
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D
D
D
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TRANSMITTER
SMART TRANSMITTER
INDUSTRIAL PROCESS CONTROL
TEST SYSTEMS
CURRENT AMPLIFIER
VOLTAGE-TO-CURRENT AMPLIFIER
RELATED 4-20mA PRODUCTS
XTR115
XTR116
5V regulator output and 2.5V reference output
5V regulator output and 4.096V reference output
NOTE: For 4-20mA complete bridge and RTO conditioner solutions,
see the XTR product family at www.ti.com.
V
REG
8
XTR117
+5V
Regulator
V+
7
B
6
Q1
I
O
R
IN
I
IN
2
A1
E
5
I
RET
3
R
1
2.475k
鈩?/div>
R
2
25
鈩?/div>
R
LIM
I
O
= 100 V
IN
R
IN
4
V
LOOP
V
IN
R
L
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments
semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date. Products
conform to specifications per the terms of Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright
錚?/div>
2005, Texas Instruments Incorporated
www.ti.com
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