Reference Design Spotlight on Thermocouple Temperature Measurement Systems

Precision DAQThermocouples are widely used in industrial applications because of their ability to accurately measure a wide range of temperatures, from approximately -200°C to +2300°C, in hostile environments such as liquid nitrogen cooling systems and processes using ovens or furnaces. Thermocouples are small, rugged, relatively inexpensive, and more linear than other sensors; and their nonlinearity has been well characterized.

Thermocouple signal levels are low (millivolts) and require precise amplification. In addition, the thermocouple wires are subject to electromagnetic fields due to power lines and other sources, and these large common-mode voltages must be rejected in order to extract the low level thermocouple signal.

Circuits from the Lab reference designs featured in the table below enable quick integration and evaluation. Expand your knowledge of thermocouple temp measurement, as well as signal chain design. Download the Thermocouple Temperature Measurement Systems Reference Design Brochure to learn more. (pdf)

About Circuits from the Lab® Reference Designs

CFTL_logo_registeredCircuit from the Lab reference designs are built and tested for function and performance by ADI's applications experts, and are commonly used in analog signal chain design as standalone solutions, or to build more complex circuits and subsystems.

These proven reference designs support quick and easy evaluation, prototyping, and design integration, and offer:

  • Comprehensive documentation
  • Complete design and integration files
  • Factory-tested evaluation hardware

Browse ADI's library of over 200 built and tested reference designs.

Signal Chain Designer™ (Beta)
Advanced Selection and Design Environment

Expand a Circuits from the Lab® Reference Design and complete the signal chain of your application. All reference designs shown in the table to the left are pre-loaded to Signal Chain Designer and accessible directly from each Circuits from the Lab reference design page.

Learn more about Signal Chain Designer.

Circuits from the Lab Reference Designs Thermocouple Temperature Measurement Systems

Download circuit notes and view additional design information using the links below.

Reference Design Cold Junction Compensation Circuit Output Digital Format Isolated Eval Hardware Pricing ($/ea)
CN0319
RTD
4-20 mA

ARM Cortex-M3, Integrated ADC/DAC


EVAL-CN0319-EB1Z
119.00
CN0300

RTD
4-20 mA
ARM Cortex-M3, Integrated ADC/DAC

EVAL-CN0300-EB1Z
119.00
CN0221
RTD

USB
ARM Cortex-M3, Integrated ADC/DAC

EVAL-CN0300-EB1Z
65.00
CN0214
RTD
USB
ARM 7, Integrated ADC/DAC

EVAL-ADUC7061MKZ
25.00
CN0206
Thermistor
Digital
SPI from ADC

EVAL-CN0206-SDPZ*
60.00
CN0172
Digital Temp Sensor
Digital
SPI from ADC

EVAL-CN0172-SDPZ*
160.00
CN0287
Digital Temp Sensor
Digital
SPI from ADC
check_mark
EVAL-CN0287-EB1Z*
99.00
CN0271
Thermocouple Amplifier
Digital
SPI from ADC

EVAL-CN0271-SDPZ*
80.00

 

* This reference design also requires EVAL-SDP-CB1Z ($99.00) and EVAL-CFTL-6V-PWRZ ($16.60).

Thermocouple Temperature Measurement Design Resources