MAX31865AAP+

Thermal Management Overview

The MAX31865AAP+ is a platinum RTD-to-digital converter optimized for PT100 to PT1000 sensors. It features a 15-bit delta-sigma ADC with a maximum conversion time of 21ms 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 ±45V input protection. It accommodates 2-, 3-, and 4-wire sensor connections within a 20-pin SSOP package.

Thermal Management Feature Summary

• Integrates a precision delta-sigma ADC to convert resistance ratios into digital values
• Provides programmable detection for open and short circuit conditions in RTD cables
• Includes integrated fault detection and ±45V input protection to enhance system reliability
• Supports 2-, 3-, and 4-wire sensor configurations via an SPI-compatible interface

Thermal Management Applications

• Industrial equipment temperature monitoring
• Medical equipment thermal sensing
• Instrumentation systems requiring high-accuracy temperature measurement

Thermal Management Procurement Notes

Verify the specific package variant against the datasheet, as the MAX31865 family includes both SSOP and TQFN options. Confirm that the ordering suffix corresponds to the tube packaging required for your assembly process. Ensure compatibility with the host microcontroller's SPI voltage levels and timing requirements before finalizing procurement.

Thermal Management Selection Notes

Select this component when designing systems utilizing platinum resistance temperature detectors such as PT100 or PT1000. It is suitable for applications demanding high accuracy and integrated fault detection without external signal conditioning. Consider the 20-pin SSOP package for through-hole or surface-mount layouts where pin count and thermal characteristics align with the board design constraints.

Thermal Management Part Context

This part belongs to the MAX31865 series of RTD-to-digital converters manufactured by Analog Devices Inc./Maxim Integrated. The series provides specialized solutions for converting resistive sensor data into digital formats. The AAP+ designation indicates the specific SSOP package variant within this product line.

Thermal Management Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.