How is the correct value for psi from MPX4250 sensor?

Oh, see… he, he, you need to do some math here then! Basically pdf datasheet states it has sensitivity of 20mV/kPa and as 1kPa = 0,145PSI, then 1PSI = ~140mV of sensor output. And now the rest depends on ADC resolution and reference voltage. IF it would be typical ATMEGA, then it would be 10bit and typically 5V (or 1.1V internal) reference. Then it is 4.883 mV/ LSB for 5V Vref. (I prefer using 1,1V though)
So psi = ADC / 28, correct me, if wrong.
But i do not know the Arduino 101 board, which is not ATMEGA based.

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