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4-20-mA current loop transmitter with 4.096-V reference and 200-μA power

 

Features for the XTR116

 

  • LOW QUIESCENT CURRENT: 200µA
  • 5V REGULATOR FOR EXTERNAL CIRCUITS
  • V REF FOR SENSOR EXCITATION:
    XTR115: 2.5V
    XTR116: 4.096V
  • LOW SPAN ERROR: 0.05%
  • LOW NONLINEARITY ERROR: 0.003%
  • WIDE LOOP SUPPLY RANGE: 7.5V to 36V
  • SO-8 PACKAGE
  • APPLICATIONS
    • 2-WIRE, 4-20mA CURRENT LOOP TRANSMITTER
    • SMART TRANSMITTER
    • INDUSTRIAL PROCESS CONTROL
    • TEST SYSTEMS
    • COMPATIBLE WITH HART MODEM
    • CURRENT AMPLIFIER
    • VOLTAGE-TO-CURRENT AMPLIFIER

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Description for the XTR116

 

The XTR115 and XTR116 are precision current output converters designed to transmit analog 4-to-20mA signals over an industry standard current loop. They provide accurate current scaling and output current limit functions.

The on-chip voltage regulator (5V) can be used to power external circuitry. A precision on-chip VREF (2.5V for XTR115 and 4.096V for XTR116) can be used for offsetting or to excite transducers. A current return pin (IRET) senses any current used in external circuitry to assure an accurate control of the output current.

The XTR115 is a fundamental building block of smart sensors using 4-to-20mA current transmission.

The XTR115 and XTR116 are specified for operation over the extended industrial temperature range, -40°C to +85°C.