MAX31865 PT100-PT1000 RTD Platinum Resistance Temperature Detector Module

MAX31865 PT100-PT1000 RTD Platinum Resistance Temperature Detector Module

The MAX31865 is an integrated circuit designed by Maxim Integrated for use with Platinum Resistance Temperature Detectors (RTDs), specifically PT100 and PT1000 sensors. These sensors are widely used in precision temperature measurement applications due to their accuracy, stability, and wide temperature range. The MAX31865 simplifies the process of interfacing these RTDs with a microcontroller by handling the signal conditioning and conversion tasks required to obtain accurate temperature readings.

Features & Specs

• Integration Lowers System Cost, Simplifies Design
• Efforts, and Reduces Design Cycle Time

• Simple Conversion of Platinum RTD Resistance to Digital Value
• Handles 100Ω to 1kΩ (at 0°C) Platinum RTDs (PT100 to PT1000)
• Compatible with 2-, 3-, and 4-Wire Sensor Connections
• SPI-Compatible Interface
• 20-Pin TQFN and SSOP Packages

• High 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

• 1x  MAX31865 RTD Platinum Resistance Temperature Detector Module