XTR117
SBOS344 − SEPTEMBER 2005
4-20mA Current-Loop Transmitter
FD EATURES
DESCRIPTION
LOW QUIESCENT CURRENT: 130µA
5V REGULATOR FOR EXTERNAL CIRCUITS
LOW SPAN ERROR: 0.05%
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.
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LOW NONLINEARITY ERROR: 0.003%
WIDE-LOOP SUPPLY RANGE: 7.5V to 40V
MSOP-8 PACKAGE
The on-chip voltage regulator (5V) can be used to power
external circuitry. A current return pin (IRET) senses any
current used in external circuitry to assure an accurate
control of the output current.
AD PPLICATIONS
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.
2-WIRE, 4-20mA CURRENT LOOP
TRANSMITTER
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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.
XTR117
IO
VREG
V+
+5V
Regulator
8
7
B
Q1
6
RIN
IIN
VLOOP
2
A1
E
VIN
5
RL
RLIM
IRET
IO = 100 VIN
RIN
3
R1
2.475k
R2
25
Ω
Ω
4
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semiconductor products and disclaimers thereto appears at the end of this data sheet.
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