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MAX31855：Cold-Junction Compensated Thermocouple-to-Digital Converter

Accurate Thermocouple-to-Digital Converter IC Simplifies Designs and Lowers System Cost

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. FAQs: MAX31855

Key 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)

MAX31855: Typical Application Circuit Applications/Uses Appliances Automotive HVAC Industrial

DataSheet

Parametrics

Design kits & evaluation modules

• MAX31855EVKIT
• MAX31855PMB1
• MAXPMBAE

Quality and Environmental Data

• MAX31855.pdf

Related Products

• MAX6675：Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +1024°C)
• MAX6674：Cold-Junction-Compensated K-Thermocouple-to-Digital Converter (0°C to +128°C)

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