MAX31865ATP RTD-to-Digital Converter IC

MAX31865ATP RTD-to-Digital Converter IC

The MAX31865ATP RTD-to-Digital Converter IC is a sophisticated resistance-to-digital converter (RTD-to-digital converter) designed by Maxim Integrated for precise temperature measurement using RTDs (Resistance Temperature Detectors), such as the Pt100 and Pt1000 sensors. This IC simplifies the interfacing of platinum RTDs with microcontrollers or digital systems by providing all the necessary functions for excitation, linearization, and digitization of the sensor signal.

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

• Simple Conversion of Platinum RTD Resistance to Digital Value
  

• High Accuracy Facilitates Meeting Error Budgets
  

• 15-Bit ADC Resolution; Nominal Temperature Resolution 0.03125NC (Varies Due to RTD Nonlinearity)
  

• Integrated Fault Detection Increases System Reliability±45V Input Protection
  

• SPI-Compatible Interface: Uses an SPI interface for simple communication with microcontrollers or digital systems.
  

• Low Power Consumption: Designed to minimize power consumption in both active and standby modes, making it suitable for battery-powered applications.
  

• Integrated Digital Filter: Provides a digital filter for noise reduction, ensuring stable and accurate temperature readings.
  

Specifications of MAX31865ATP RTD-to-Digital Converter IC

• Supply Voltage (VDD): 3.0V to 3.6V
  

• Operating Temperature Range: -40°C to +125°C
  

• RTD Excitation Current: Selectable currents (5.5µA to 1mA) for optimal measurement accuracy
  

• RTD Resistance Range: Suitable for Pt100 and Pt1000 RTDs
  

• Resolution: 15-bit ADC resolution
  

• SPI Communication: Supports clock speeds up to 10 MHz
  

• Standby Current: 0.65 µA (typical)
  

Package Includes

• 1 x MAX31865ATP RTD-to-Digital Converter IC