MAX31865AAP+: Top Choice in United States (USA) Utsource Holding Company Limited

Description

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	2.7		5.5	V
Supply Current	IDD	All channels off		100		μA
RTD Bias Current	IBIAS		0.345	0.35	0.355	mA
Fault Detection Time		After power-up		62.5		ms
Conversion Time		50/60 Hz rejection		27		ms
Temperature Range		RTD measurement	-200		+850	°C
Differential Input Voltage	VIN		±0.3		±0.3	V

Power Supply Connection:
- Connect the supply voltage (VDD) between 2.7V and 5.5V to the VDD pin and GND to the ground pin.
RTD Configuration:
- Connect the RTD sensor to the appropriate pins (RTDN, RTDP).
- Ensure the RTD bias current is within the specified range (0.345mA to 0.355mA).
Configuration Register Setup:
- Set the configuration register via SPI interface to configure fault detection, conversion mode, and other settings as required.
Fault Detection:
- After powering up, the device will perform a fault detection cycle which takes approximately 62.5ms.
- Check the fault status register to determine if any faults are detected.
Temperature Measurement:
- Initiate a temperature conversion by setting the appropriate bit in the configuration register.
- Wait for the conversion time (approximately 27ms at 50/60Hz rejection) before reading the result from the data register.
Reading Results:
- Read the temperature data from the data registers using the SPI interface.
- Convert the raw ADC output to temperature using the provided formula or lookup table.
Handling Differential Input Voltage:
- Ensure that the differential input voltage does not exceed ±0.3V to avoid damage or inaccurate readings.
Operating Temperature:
- The device can operate over a temperature range of -200°C to +850°C when used with an appropriate RTD sensor.

For detailed programming instructions and additional specifications, refer to the official datasheet provided by Maxim Integrated.

(For reference only)