Details

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BUY MAX31865AAP+ https://www.utsource.net/itm/p/12609224.html

Parameter	Symbol	Conditions	Min	Typ	Max	Unit
Supply Voltage	VDD	Operating	2.7		5.5	V
Supply Current	IDD	All channels off		100		渭A
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	掳C
Differential Input Voltage	VIN		卤0.3		卤0.3	V

Instructions for MAX31865AAP+

1. Power Supply Connection:

   • Connect the supply voltage (VDD) between 2.7V and 5.5V to the VDD pin and GND to the ground pin.

2. 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).

3. Configuration Register Setup:

   • Set the configuration register via SPI interface to configure fault detection, conversion mode, and other settings as required.

4. 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.

5. 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.

6. 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.

7. Handling Differential Input Voltage:

   • Ensure that the differential input voltage does not exceed 卤0.3V to avoid damage or inaccurate readings.

8. Operating Temperature:

   • The device can operate over a temperature range of -200掳C to +850掳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)