MAX31865 RTD Platinum Resistance Temperature Detector (RTD) to Digital Converter Module

₹590

01 — About

What it does

The MAX31865 RTD Platinum Resistance Temperature Detector (RTD) to Digital Converter Module is a high-accuracy RTD interface module designed for PT100 and PT1000 platinum resistance temperature sensors. Based on the MAX31865 precision converter IC, it accurately converts RTD resistance into digital temperature data through an SPI communication interface. Featuring built-in fault detection and support for both 2-wire, 3-wire, and 4-wire RTD configurations, it is ideal for industrial automation, laboratory equipment, process control, and embedded temperature monitoring applications.

Key features

Based on the MAX31865 precision RTD-to-digital converter IC
Compatible with PT100 and PT1000 RTD sensors
Supports 2-wire, 3-wire, and 4-wire RTD configurations
SPI digital communication interface
High-accuracy temperature measurement
Integrated fault detection and diagnostics
Low-noise 15-bit ADC with programmable filtering
Suitable for industrial and embedded temperature monitoring

Good to know

Select the correct module variant for PT100 or PT1000 RTD sensors.
Configure the module for 2-wire, 3-wire, or 4-wire RTD operation as required.
Operate the module with a 3.3V supply unless the module includes onboard level shifting and regulation.
Use shielded cables for long RTD connections to minimize electrical noise.
Calibrate the system if high-precision temperature measurements are required.

02 — Datasheet

Specifications

Converter IC: MAX31865
Supported RTD Sensors: PT100, PT1000
RTD Configuration: 2-Wire, 3-Wire, 4-Wire
Communication Interface: SPI
ADC Resolution: 15-bit
Operating Voltage: 3.0V to 3.6V (Logic Compatible with 3.3V Systems)
Temperature Range: Dependent on RTD Sensor (Typically -200°C to +850°C for PT100/PT1000)
Noise Rejection: 50Hz / 60Hz Selectable Filter
Fault Detection: Open Circuit, Short Circuit, Overvoltage Detection
Operating Temperature: -40°C to +85°C