Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)


The MAX6675 performs cold-junction compensation and digitizes the signal from a type-K thermocouple. The data is output in a 12-bit resolution, SPI™-compatible, read-only format.

This converter resolves temperatures to 0.25°C, allows readings as high as +1024°C, and exhibits thermocouple accuracy of 8 LSBs for temperatures ranging from 0°C to +700°C.

The MAX6675 is available in a small, 8-pin SO package.
MAX6675: Typical Application Circuit MAX6675: Typical Application Circuit Enlarge+

Key Features

  • Cold-Junction Compensation
  • Simple SPI-Compatible Serial Interface
  • 12-Bit, 0.25°C Resolution
  • Open Thermocouple Detection


  • Appliances
  • HVAC
  • Industrial

MAX6675EVKIT: MAX6675 Evaluation Kit

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MAXREFDES111#: Isolated 24V to 5V 2W Flyback Power Supply

Type ID Title
Evaluation Board3318MAX6675EVKIT MAX6675 Evaluation Kit