The Grove 1-Wire Thermocouple Amplifier (MAX31850K) is a thermocouple-to-digital converter with 14-bit resolution and cold-junction compensation. This module is designed to be used in conjunction with a k-type thermocouple. The thermocouples have a much larger measurement range than thermistors. For example, a k-type thermocouple has a measurement range of -50℃ to +600℃.

This module is based on the MAX31850K, which integrates an amplifier, ADC, and 64-bit ROM. Thanks to the 64-bit ROM, each device has a unique 64-bit serial code, which allows multiple units to function on the same 1-Wire bus. Therefore, it is simple to use one microcontroller (the master device) to monitor temperature from many thermocouples distributed over a large area.

Again, this module can't work alone, it must work with a k-type thermocouple.

Attention:

Usually, the positive pole of the K-type thermocouple is red and the negative is light white, but we can't guarantee that all K-type thermocouples are like this.

Highlighted Features

- Integrated Cold-Junction Compensation

- Wide Conversion Range: allow readings from -270℃ to +1768℃

- 14-Bit, 0.25℃ Resolution

- Will not work with any other kind of thermocouple except K type

- Detects Thermocouple Shorts to GND or VDD

- Detects Open Thermocouple

Applications

- Medical

- Appliances

- Industrial

- HVAC(Heating, Ventilation, and Air Conditioning)

Hardware Overview

Figure 1: Connection Inputs

Figure 2: Development Board Schematics

Figure 3: Development Board Connectors

Documentation