XTR117 Datasheet, PDF (1/11 Pages) Texas Instruments – 4-20mA Current-Loop Transmitter

XTR117
SBOS344 − SEPTEMBER 2005
4-20mA Current-Loop Transmitter
FEATURES
D LOW QUIESCENT CURRENT: 130µA
D 5V REGULATOR FOR EXTERNAL CIRCUITS
D LOW SPAN ERROR: 0.05%
D LOW NONLINEARITY ERROR: 0.003%
D WIDE-LOOP SUPPLY RANGE: 7.5V to 40V
D MSOP-8 PACKAGE
APPLICATIONS
D 2-WIRE, 4-20mA CURRENT LOOP
TRANSMITTER
D SMART TRANSMITTER
D INDUSTRIAL PROCESS CONTROL
D TEST SYSTEMS
D CURRENT AMPLIFIER
D VOLTAGE-TO-CURRENT AMPLIFIER
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, −40°C to +125°C.
RELATED 4-20mA PRODUCTS
XTR115
5V regulator output and 2.5V reference output
XTR116
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
R_IN
I_IN
2
V_IN
I_RET
3
A1
R₁
2.475kΩ
+5V
Regulator
V+
I_O
7
B
Q1
6
R_LIM
R₂
25Ω
E
5
I_O = 100 V_IN
R_IN
4
V_LOOP
R_L
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PRODUCTION DATA information is current as of publication date. Products
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Production processing does not necessarily include testing of all parameters.
Copyright  2005, Texas Instruments Incorporated
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