MAX31865 High Precision Isolation Temperature Acquisition Module PT100/PT1000 (multi-channel Support) RTD

Specifications:

• Easy-to-Use PT100/PT1000 Temperature Measurement Module.
• Precision reference resistors: 0.1%/25ppm (402Ω for PT100, 4.02kΩ for PT1000).
• Wide supply voltage: 2.7–9VDC, current consumption: 30mA @3.3V, 19mA @5V.
• Isolation voltage: ≥2500VDC
• Standard SPI interface with multiplexing support for multi-channel acquisition
• Supports 2-/3-/4-wire PT100/PT1000 connections (default: 4-wire)
• Includes STM32 reference code (download documentation at page bottom)

Q&A

Q: Difference between PT100 and PT1000?
A: PT100 uses a 402Ω reference resistor, while PT1000 uses 4.02kΩ.

Q: Temperature measurement range?
A: –200°C to +550°C (refer to MAX31865 datasheet Page 21).

Q: Accuracy?
A:With Class A sensor: ±0.5°C absolute accuracy (uncalibrated)，peak-to-peak noise: 0.093°C (at max update rate without digital filtering),Resolution: 0.03°C.