General Description

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

Features

● Cold-Junction Compensation

● 14-Bit, 0.25NC Resolution

● Versions Available for K, J, N, T, and E Type

    Thermocouples (Contact Factory for S and R Type

    Availability) (see Table 1)

● Simple SPI-Compatible Interface (Read-Only)

● Detects Thermocouple Shorts to GND or VCC

● Detects Open Thermocouple