MAX31856MUD+T

MAX31856MUD+T is a precision thermocouple to digital converter with linearization. It performs cold-junction compensation and digitizes the signal from any type of thermocouple. The output data is formatted in degrees Celsius. 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. An SPI-compatible interface allows selection of thermocouple type and setup of the conversion and fault detection processes. Applications include temperature controllers, industrial ovens, furnaces, and environmental chambers, industrial equipment.

• Provides high-accuracy thermocouple temperature readings
• Includes automatic linearization correction for 8 thermocouple types
• 19-bit, 0.0078125°C thermocouple temperature resolution
• Typical supply current is 5.25µA (standby), 1.2mA (active conversion) at 3.0V ≤ VDD ≤ 3.6V
• Thermocouple input bias current is 10nA max at TA=+25°C, 3.0V ≤ VDD ≤ 3.6V
• Input-Referred Noise is 1.3µVRMS typ at AV=8, 3.0V ≤ VDD ≤ 3.6V, TA=-55°C to +125°C
• Power-supply rejection is 0.15°C/V typ at 3.0V ≤ VDD ≤ 3.6V, TA=-55°C to +125°C
• Common-mode rejection is 70dB typ at 0.5V ≤ VCM ≤ 1.4V, 3.0V ≤ VDD ≤ 3.6V, TA=-55°C to +125°C
• 14 TSSOP package
• Temperature rating range from -55°C to +125°C

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