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


Design files


This reference 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.

  • 24-V single supply
  • 0-V to 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
??image.gallery.download_en_US?? View video with transcript Video

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

TIDRL23.PDF (230 K)

Detailed schematic diagram for design layout and components

TIDRL24.PDF (113 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

TIDCC02.ZIP (1000 K)

Design file that contains information on physical board layer of design PCB


Includes TI products in the design and potential alternatives.

Precision op amps (Vos<1mV)

OPA2317Dual, Low Offset, Rail-to-Rail I/O Operational Amplifier

Data sheet: PDF | HTML
Instrumentation amplifiers

INA18836-V, Zero-Drift, Rail-to-Rail-Out Instrumentation Amplifier

Data sheet: PDF | HTML
Series voltage references

REF02Wide supply range, 5-V output precision voltage reference

Data sheet: PDF

Technical documentation

= Top documentation selected by TI
No results found. Please clear your search and try again.
View all 1
Type Title Date
* User guide Single-Supply Thermocouple with RTD Base Cold-Junction Compensation Design Guide Jul. 08, 2016

Support & training

TI E2E™ forums with technical support from TI engineers

View all forum topics

Content is provided "as is" by TI and community contributors and does not constitute TI specifications. See terms of use.

If you have questions about quality, packaging or ordering TI products, see TI support. ​​​​​​​​