4-20mA Current Transmitter with Sensor Excitation and Linearization - XTR105

XTR105 (ACTIVE)

4-20mA Current Transmitter with Sensor Excitation and Linearization

Recommended alternative parts

  • XTR112  -  2 matched 250uA current sources instead of 800uA sources.
  • XTR114  -  2 matched 100uA current sources instead of 800uA sources.
  • XTR108  -  More programmable. 2 matched 500uA current sources instead of 800uA sources. Also includes 5V regulator.
  • XTR101  -  11.6V to 40V supply instead of 7.5V to 36V. 2 matched 1mA current sources instead of 800uA sources.

Description

The XTR105 is a monolithic 4-20mA, 2-wire current transmitter with two precision current sources. It provides complete current excitation for platinum RTD temperature sensors and bridges, instrumentation amplifiers, and current output circuitry on a single integrated circuit.

Versatile linearization circuitry provides a 2nd-order correction to the RTD, typically achieving a 40:1 improvement in linearity.

Instrumentation amplifier gain can be configured for a wide range of temperature or pressure measurements. Total unadjusted error of the complete current transmitter is low enough to permit use without adjustment in many applications. This includes zero output current drift, span drift, and nonlinearity. The XTR105 operates on loop power-supply voltages down to 7.5V.

The XTR105 is available in DIP-14 and SO-14 surface-mount packages and is specified for the –40°C to +85°C industrial temperature range.

Features

  • LOW UNADJUSTED ERROR
  • TWO PRECISION CURRENT SOURCES: 800 µA each
  • LINEARIZATION
  • 2-OR 3-WIRE RTD OPERATION
  • LOW OFFSET DRIFT: 0.4 µV/°C
  • LOW OUTPUT CURRENT NOISE: 30NAPP
  • HIGH PSR: 110dB minimum
  • HIGH CMR: 86dB minimum
  • WIDE SUPPLY RANGE: 7.5V to 36V
  • DIP-14 AND SO-14 PACKAGES
  • APPLICATIONS
    • INDUSTRIAL PROCESS CONTROL
    • FACTORY AUTOMATION
    • SCADA REMOTE DATA ACQUISITION
    • REMOTE TEMPERATURE AND PRESSURE TRANSDUCERS

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Parametrics Compare all products in 4-20mA Conditioning

 
Vs (Min) (V)
Vs (Max) (V)
Loop Voltage (V)
Full Scale Input Range
Non-Linearity (Max) (%)
Output Zero Error (+/-) (Max) (uA)
Auxiliary Output Voltage (V)
Span Error (Max) (%)
Offset Voltage (+/-) (Max) (uV)
Offset Voltage Drift (+/-) (Max) (uV/Degrees Celsius)
CMRR, 60Hz (Min) (dB)
Package Group
Estimated Package Size (WxL) (mm2)
Approx. Price (US$)
Sensor Excitation
Output Range (mA)
Pin/Package
XTR105
7.5    
36    
7.5 to 36    
5mV to 1V    
0.01    
25    
5.1    
0.2    
25    
1.5    
86    
PDIP
SOIC    
14SOIC: 3.91 x 8.65: 51 mm2
14PDIP: 6.35 x 19.3: 161 mm2    
4.60 | 1ku    
Two 800uA sources    
4 to 20    
14PDIP
14SOIC    

Companion parts

Part # Name Product Family Comments
ISO124   Precision Lowest Cost Isolation Amplifier   AMPLIFIERS AND LINEAR - ISOLATION AMPLIFIER    XTR105 can be used with the ISO124 in Isolated 4-20mA Instrument Loop.
See Literature sbos074c  
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