MAX31865ATP+

Thermal Management Overview

The MAX31865ATP+ is a platinum resistance temperature detector (RTD) to digital converter optimized for PT100 and PT1000 sensors. It features a 15-bit delta-sigma ADC with a nominal temperature resolution of 0.03125°C and total accuracy of ±0.5°C over the operating range. The device operates on a 3.0V to 3.6V supply, supports SPI interfaces up to 5MHz, and includes integrated fault detection for open/short circuits alongside ±45V input protection. It is housed in a 20-pin TQFN package.

Thermal Management Feature Summary

• Integrates signal conditioning and analog-to-digital conversion for direct RTD resistance measurement
• Supports 2-wire, 3-wire, and 4-wire sensor connection configurations
• Provides programmable fault detection for cable opens, shorts, and out-of-range voltages
• Includes internal bias voltage generation and fully differential reference inputs

Thermal Management Applications

• Industrial equipment
• Medical equipment
• Instrumentation

Thermal Management Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging when sourcing. Confirm the manufacturer is Analog Devices Inc./Maxim Integrated. Ensure the component matches the 20-TQFN physical footprint and electrical specifications provided in the official datasheet before integration into designs.

Thermal Management Selection Notes

Select this component for applications requiring high-accuracy temperature monitoring using platinum RTDs. It simplifies design by replacing multiple discrete components. Consider the 20-TQFN package size and thermal characteristics for PCB layout. Verify compatibility with the host microcontroller's SPI interface timing requirements.

Thermal Management Part Context

This part belongs to the MAX31865 family of RTD-to-digital converters manufactured by Analog Devices Inc./Maxim Integrated. It is designed as a complete single-chip solution for converting platinum RTD resistance values into digital data, reducing system cost and design cycle time compared to discrete implementations.

Thermal Management Replacement Considerations

The MAX31865AAP+ is a documented alternative within the same product family, utilizing a 20-SSOP package instead of the TQFN form factor. Both devices share identical electrical performance and functionality.