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MAX31855
  • MAX31855

MAX31855

PRODUCTION

Cold-Junction Compensated Thermocouple-to-Digital Converter Accurate Thermocouple-to-Digital Converter IC Simplifies Designs and Lowers System Cost

Analog Devices MAX31855 Product Info

10 February 2026 5

Features

  • Integration Reduces Design Time and Lowers System Cost
    • 14-Bit, 0.25°C Resolution Converter
    • Integrated Cold-Junction Compensation
    • Versions Available for Most Common Thermocouple Types: K-, J-, N-, T-, S-, R-, and E-Type
    • Detects Thermocouple Shorts to GND or VCC
    • Detects Open Thermocouple
  • Interfaces to Most Microcontrollers
    • Simple SPI-Compatible Interface (Read-Only)

Part details & applications

The MAX31855 performs cold-junction compensation and digitizes the signal from a K-, J-, N-, T-, S-, R-, or E-type thermocouple. The data is output in a signed 14-bit, SPI-compatible, read-only format. This converter resolves temperatures to 0.25°C, allows readings as high as +1800°C and as low as -270°C, and exhibits thermocouple accuracy of ±2°C for temperatures ranging from -200°C to +700°C for K-type thermocouples. For full range accuracies and other thermocouple types, see the Thermal Characteristics specifications in the full data sheet.

Applications

  • Appliances
  • Automotive
  • HVAC
  • Industrial

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