Universal Thermocouple Amplifier MAX31856 Breakout

SPI thermocouple amplifier breakout supporting B, E, J, K, N, R, S, and T thermocouple types via the MAX31856, with cold-junction compensation and configurable fault/alert outputs. Upgrade over the K-only MAX31855.

Vin
Power input for the breakout. Adafruit Learn says the onboard regulator accepts 3-5VDC and to power it at the microcontroller logic level.
Type · powerVoltage · 3-5VDC input, same as logic level on Vin
3Vo
3.3V regulator output available from the breakout.
Type · powerVoltage · 3.3V output, up to 100mA per Adafruit Learn
GND
Common ground for power and logic.
Type · groundVoltage · 0V
SCK
SPI clock input to the MAX31856 breakout.
Type · signalVoltage · 3-5V logic safe, use the logic level on Vin
SDO
SPI data out from the MAX31856 to the microcontroller, MISO.
Type · signalVoltage · 3-5V logic safe, use the logic level on Vin

Start wiring

I2C · SPI · Single data line · 3.3 – 5 V · Breakout

Verify supply voltage and logic levels before powering up.

Module pins: Vin, 3Vo, GND, SCK, SDO, SDI, CS, FLT. Schematik maps them to your board in the app.

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