Cold-Junction Compensated Thermocouple-to-Digital Converter

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

* 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)