MAX31865 Temperature Thermocouple Sensor Amplifier Module

MAX31865  Temperature Thermocouple Sensor Amplifier Module/PT100 to PT1000 RTD-to-Digital Converter Board 3.3V/5V

Introduction

The MAX31865 handles all of your RTD needs, and can even compensate 3 or 4 wire RTDs for better accuracy. Connect to it with any microcontroller over SPI and read out the resistance ratio from the internal ADC. We put a 4300 0.1% resistor as a reference resistor on the breakout.

We even made the breakout 5V compliant, with a 3.3V regulator and level shifting, so you can use it with any for For Ard uino or microcontroller.

Each order comes with one assembled RTD amplifier breakout board. Also comes with two 2-pin terminal blocks (for connecting to the RTD sensor) and pin header (to plug into any breadboard or perfboard).

Features and benefits

1. Support 100Ω to 1kΩ(0°C) platinum resistance RTD (PT100 to PT1000);
2. Compatible with 2-wire, 3-wire and 4-wire sensor connections;
3. SPI compatible interface;
4.15-bit ADC resolution with a nominal temperature resolution of 0.03125 °C(variable with RTD nonlinearity);
5. The total accuracy is maintained at 0.5°C (0.05% of full scale) under the entire working conditions;
6 fully differential VREF input;
7. Conversion time: 21ms (maximum);
8. Integrated fault detection to increase system stability: (RTD open circuit, RTD short circuit to voltage outside the range or short circuit of RTD components).
Please note: this does not include an RTD sensor!