MAX31855

MAX31855 Cold-Junction Compensated Thermocouple-to-Digital Converter General Description 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. Applications ●● Industrial ●● Appliances ●● HVAC Typical Application Circuit Benefits and 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) Ordering Information appears at end of data sheet. For related parts and recommended products to use with this part, refer to www.maximintegrated.com/MAX31855.related. VCC 0.1µF MAX31855 GND T+ T- SO SCK CS MICROCONTROLLER MISO SCK SS 19-5793; Rev 5; 1/15 MAX31855 Cold-Junction Compensated Thermocouple-to-Digital Converter Absolute Maximum Ratings Supply Voltage Range (VCC to GND...