Professional IC Distribution & Technical Solutions

The MAX31865AAP+T is a precision resistance-to-digital converter manufactured by Maxim Integrated (now part of Analog Devices). It is designed for use with platinum resistance temperature detectors (RTDs) and provides high accuracy and noise immunity.

Specifications:

• Manufacturer: Maxim Integrated (Analog Devices)
• Part Number: MAX31865AAP+T
• Type: Resistance-to-Digital Converter (RTD-to-Digital Converter)
• Interface: SPI (Serial Peripheral Interface)
• Resolution: 15-bit ADC
• Input Type: 2-, 3-, or 4-wire RTD configuration
• RTD Types Supported: Pt100, Pt1000, or other similar RTDs
• Supply Voltage: 3.0V to 3.6V
• Operating Temperature Range: -40°C to +125°C
• Package: 20-pin SSOP (Shrink Small Outline Package)
• Features:
• Built-in fault detection (open/short circuit, RTD out of range)
• Programmable excitation current (50µA to 800µA)
• High noise immunity with integrated digital filtering
• Low drift voltage reference (±10 ppm/°C max)
• Configurable for 50Hz/60Hz noise rejection

Descriptions:

The MAX31865AAP+T is a complete solution for digitizing RTD resistance measurements. It includes a precision delta-sigma ADC, a configurable excitation current source, and fault detection circuitry. The device communicates via SPI, making it easy to interface with microcontrollers.

Features:

• High Accuracy: 15-bit ADC resolution ensures precise temperature measurements.
• Flexible RTD Support: Works with 2-, 3-, or 4-wire RTD configurations.
• Integrated Fault Detection: Detects open/short circuits and RTD faults.
• Low Power Consumption: Optimized for battery-powered applications.
• Robust Design: High noise immunity and EMI resistance.
• Wide Temperature Range: Operates in harsh environments (-40°C to +125°C).

This device is commonly used in industrial, medical, and automotive applications where accurate temperature monitoring is critical.