Professional IC Distribution & Technical Solutions

The MAX31865ATP+T is a precision resistance-to-digital converter designed for platinum resistance temperature detectors (RTDs). Below are its key specifications, descriptions, and features:

Manufacturer:

MAXIM (now part of Analog Devices)

Specifications:

• Input Type: RTD (Resistance Temperature Detector)
• RTD Types Supported: PT100, PT1000, or similar
• Resolution: 15-bit ADC
• Accuracy: ±0.5°C (typical) over a wide temperature range
• Supply Voltage: 3.0V to 3.6V
• Current Consumption: 1.65mA (typical)
• Communication Interface: SPI (Serial Peripheral Interface)
• Operating Temperature Range: -40°C to +125°C
• Package: 20-pin TQFN (Thin Quad Flat No-Lead)

Descriptions:

The MAX31865ATP+T integrates a high-resolution delta-sigma ADC with an RTD excitation current source, simplifying the interface to platinum RTDs. It includes fault detection for open/short circuits and provides digital output via SPI, making it suitable for industrial and medical temperature sensing applications.

Features:

• Integrated RTD Excitation Current Source (configurable for 2-, 3-, or 4-wire connections)
• Programmable Fault Detection (open/short circuit, RTD out-of-range)
• High Noise Immunity (50Hz/60Hz rejection)
• Low Power Consumption (1.65mA typical)
• Wide Operating Temperature Range (-40°C to +125°C)
• SPI-Compatible Interface for easy microcontroller interfacing

This device is ideal for applications requiring high-precision temperature measurements, such as industrial controls, medical equipment, and HVAC systems.