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MAX31856 - Precision Thermocouple to Digital Converter

Description

The MAX31856 performs cold-junction compensation and digitizes the signal from any type of thermocouple.

The output data is formatted in degrees Celsius.

Features

  • Provides High-Accuracy Thermocouple Temperature Readings.
  • Includes Automatic Linearization Correction for 8 Thermocouple Types.
  • ±0.15% (max, -20°C to +85°C) Thermocouple FullScale and Linearity Error.
  • 19-Bit, 0.0078125°C Thermocouple Temperature Resolution.
  • Internal Cold-Junction Compensation Minimizes System Components.
  • ±0.7°C (max, -20°C to +85°C) Cold-Junction Accuracy.
  • ±45V Input Protection Provides Robust System Performance.

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Full PDF Text Transcription

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MAX31856 EVALUATION KIT AVAILABLE Precision Thermocouple to Digital Converter with Linearization General Description The MAX31856 performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees Celsius. This converter resolves temperatures to 0.0078125°C, allows readings as high as +1800°C and as low as -210°C (depending on thermocouple type), and exhibits thermocouple voltage measurement accuracy of ±0.15%. The thermocouple inputs are protected against overvoltage conditions up to ±45V. A lookup table (LUT) stores linearity correction data for several types of thermocouples (K, J, N, R, S, T, E, and B). Line frequency filtering of 50Hz and 60Hz is included, as is thermocouple fault detection.
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