Thermocouple Amplifier with 1-Wire Breakout Board - MAX31850K
33 units available with a short lead time.
The MAX31850K breakout board is a 1-Wire thermocouple amplifier with cold-junction compensation for K-type thermocouples. Unlike SPI-based amplifiers, the 1-Wire interface allows any number of thermocouple breakouts to share a single data line — ideal for multi-point temperature measurement.
The board includes the MAX31850K chip, a 3.3V regulator, and 10μF bypass capacitors, all assembled and tested. It supports both parasitic power (power on the data line) and local power via the Vin pin.
Key Features
- 1-Wire Interface – Multiple thermocouple amps on a single shared data line
- K-Type Thermocouple Only – Measures -270°C to +1370°C in 0.25°C increments
- Internal Temperature Reading – Built-in cold-junction compensation
- Parasitic or Local Power – Flexible power configuration
- 3.3V to 5V Supply – On-board 3.3V regulator (data line is 3V only)
- Breadboard Friendly – Included pin header for easy prototyping
Package Contents
- 1× MAX31850K breakout board (assembled and tested)
- 1× 2-pin terminal block (for thermocouple connection)
- 1× 4.7K data line pull-up resistor
- 1× Pin header
Important: This board works with K-type thermocouples only. It will not work with any other thermocouple type.
Note: The data line operates at 3V only and does not include level shifting. A logic level converter is recommended when using with 5V microcontrollers. Terminal block colour may vary (blue or black).
Resources
The Thermocouple Amplifier with 1-Wire Breakout Board - MAX31850K appears in the following collections:
SKU AF-1727
by Adafruit
