MAX31865 PT100-PT1000 RTD Platinum Resistance Temperature Detector Module
- Product SKU: R0290
- Category: Arduino Ecosystem, ESP32 & NodeMCU Ecosystem, Intermediate Projects, IoT Projects, Premium ₹1500+, Sensor Modules, Sensors, Sensors, Sensors
For accurate temperature measurement, the MAX31865 RTD Platinum Resistance Temperature Detector Module (PT100-PT1000) stands out. Resistance temperature detectors (RTDs) are temperature sensors featuring a resistor that alters its resistance value in response to temperature changes, similar to a thermistor. In this sensor, the resistor consists of a thin strip of platinum with a resistance of 100 ohms at 0°C, hence the name PT100.
When compared to most NTC/PTC thermistors, the PT-type RTD is considerably more stable and precise, albeit at a higher cost. PT100s have been trusted for years to measure temperature in laboratory and industrial applications, earning a reputation for superior accuracy (exceeding that of thermocouples), repeatability, and stability.
The MAX31865 is a user-friendly thermistor-to-digital output converter designed specifically for platinum resistance temperature detectors (RTDs). An external resistor adjusts the RTD sensitivity, while the high-precision ADC converts the ratio of the RTD resistor to the reference resistor into a digital output. Additionally, the MAX31865 includes overvoltage protection up to 45V and offers configurable detection for RTD and cable open or short-circuit conditions.
Specifications and Features:-
Integration Lowers System Cost, Simplifies Design
Efforts, and Reduces Design Cycle Time
Simple Conversion of Platinum RTD Resistance to Digital Value
Handles 100 to 1k (at 0C) Platinum RTDs (PT100 to PT1000)
Compatible with 2-, 3-, and 4-Wire Sensor Connections
SPI-Compatible Interface
20-Pin TQFN and SSOP PackagesHigh Accuracy Facilitates Meeting Error Budgets
15-Bit ADC Resolution; Nominal Temperature
Resolution 0.03125NC (Varies Due to RTD Nonlinearity)
Total Accuracy Over All Operating Conditions:
0.5NC (0.05% of Full Scale) max
Fully Differential VREF Inputs
21ms (max) Conversion Time
Integrated Fault Detection Increases System Reliability
45V Input Protection
Fault Detection (Open RTD Element, RTD Shorted to Out-of-Range Voltage, or Short Across RTD Element)
Package Includes:-
1 x MAX31865 RTD Platinum Resistance Temperature Detector Module PT100-PT1000
For accurate temperature measurement, the MAX31865 RTD Platinum Resistance Temperature Detector Module (PT100-PT1000) stands out. Resistance temperature detectors (RTDs) are temperature sensors featuring a resistor that alters its resistance value in response to temperature changes, similar to a thermistor. In this sensor, the resistor consists of a thin strip of platinum with a resistance of 100 ohms at 0°C, hence the name PT100.
When compared to most NTC/PTC thermistors, the PT-type RTD is considerably more stable and precise, albeit at a higher cost. PT100s have been trusted for years to measure temperature in laboratory and industrial applications, earning a reputation for superior accuracy (exceeding that of thermocouples), repeatability, and stability.
The MAX31865 is a user-friendly thermistor-to-digital output converter designed specifically for platinum resistance temperature detectors (RTDs). An external resistor adjusts the RTD sensitivity, while the high-precision ADC converts the ratio of the RTD resistor to the reference resistor into a digital output. Additionally, the MAX31865 includes overvoltage protection up to 45V and offers configurable detection for RTD and cable open or short-circuit conditions.
Specifications and Features:-
Integration Lowers System Cost, Simplifies Design
Efforts, and Reduces Design Cycle Time
Simple Conversion of Platinum RTD Resistance to Digital Value
Handles 100 to 1k (at 0C) Platinum RTDs (PT100 to PT1000)
Compatible with 2-, 3-, and 4-Wire Sensor Connections
SPI-Compatible Interface
20-Pin TQFN and SSOP PackagesHigh Accuracy Facilitates Meeting Error Budgets
15-Bit ADC Resolution; Nominal Temperature
Resolution 0.03125NC (Varies Due to RTD Nonlinearity)
Total Accuracy Over All Operating Conditions:
0.5NC (0.05% of Full Scale) max
Fully Differential VREF Inputs
21ms (max) Conversion Time
Integrated Fault Detection Increases System Reliability
45V Input Protection
Fault Detection (Open RTD Element, RTD Shorted to Out-of-Range Voltage, or Short Across RTD Element)
Package Includes:-
1 x MAX31865 RTD Platinum Resistance Temperature Detector Module PT100-PT1000
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Last updated: January 2026
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