MAX31850K Thermocouple Amplifier

Cold-junction compensated thermocouple-to-digital converter with 1-Wire bus interface. The thermocouple leads are external sensor terminals, not MCU GPIO.

Logical pinout · physical placement not verified

VCC
3.3V supply for MCU-safe use; IC supply range is 3.0V-3.7V.
Type · PowerVoltage · 3.3
GND
Common ground
Type · Ground
DQ
1-Wire data bus. Requires pull-up to VCC; many breakouts include it.
Type · GPIOVoltage · 3.3
T+
Thermocouple positive terminal.
Type · Analog
T-
Thermocouple negative terminal.
Type · Analog

Pin	Type	Function	Voltage
VCC	Power	3.3V supply for MCU-safe use; IC supply range is 3.0V-3.7V.	3.3
GND	Ground	Common ground
DQ	GPIO	1-Wire data bus. Requires pull-up to VCC; many breakouts include it.	3.3
T+	Analog	Thermocouple positive terminal.
T-	Analog	Thermocouple negative terminal.

Logical pinout · physical placement not verified

Pin details

5 connections

VCC
3.3V supply for MCU-safe use; IC supply range is 3.0V-3.7V.
PowerVoltage · 3.3
GND
Common ground
Ground
DQ
1-Wire data bus. Requires pull-up to VCC; many breakouts include it.
GPIOVoltage · 3.3
T+
Thermocouple positive terminal.
Analog
T-
Thermocouple negative terminal.
Analog

Start wiring

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

Confirm the data interface matches your host board.

Module pins: VCC, GND, T+, T-. Schematik maps them to your board in the app.

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