MAX31855 - Maxim Integrated Products

MAX31855 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 temper.

Features

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● 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
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● 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 C.