Single-Supply Thermocouple Amplifier with RTD Based Cold Junction Compensation Reference Design
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Key Document


This TI Design uses a thermocouple to measure temperatures from -50 °C to 500 °C. The design uses cold junction compensation to reduce errors associated with changes in the cold junction temperature of the thermocouple. The design operates on a single 24 V supply and has a linear output range of 250 mV to 5 V.

  • 24V Single Supply
  • 0 V - 5 V Output
  • Uncalibrated Measured Error of -0.037%
  • Hot Junction Temperatures of -50 °C to 500 °C
  • Cold Junction Temperatures of 0 °C to 75 °C

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Design Files

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TI Devices (3)

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Part Number Name Product Family Sample & Buy Design Kits & Evaluation Modules
INA188  36-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier  Amplifiers  Sample & Buy View Design Kits & Evaluation Modules
OPA2317  Dual, Low Offset, Rail-to-Rail I/O Operational Amplifier  Operational amplifiers (op amps)  Sample & Buy View Design Kits & Evaluation Modules
REF02  Wide Supply Range, 5-V Output Precision Voltage Reference  Voltage references  Sample & Buy Not Available

CAD/CAE symbols

Part # Package | Pins CAD File (.bxl) STEP Model (.stp)
INA188 Download Download
OPA2317 Download
REF02 Download Download
Download Download

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Technical Documents

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User guides (1)
Title Type Size (KB) Date
PDF 23214 08 Jul 2016
Design files (3)
Title Type Size (KB) Date
ZIP 1000 31 Mar 2016
PDF 113 31 Mar 2016
PDF 230 31 Mar 2016

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