How to convert voltage from analog sensor into human readable data?

[nitish1]

Hello,

I am kind of new to the electronics world.

I recently bought two MPXV7002DP. They are working fine.

I supply it with 5 volts and it's output is:

At idle, it's 2.42 volts.

At maximum pressure (2000 Pa) it's 4.75 volts.

At lowest pressure (-2000 Pa) it's 0.03 volts.

My question is that, how do I convert this voltage into pascals?

What is the formula I should use?

I am sure it's available in the data sheet but I was not able to figure it out.

Could someone please help me out?

[reyes]

Hi,

Its is simple to convert the voltage read from the sensor into pascals, in page 5 of the device datasheet (https://www.nxp.com/docs/en/data-sheet/MPXV7025.pdf), you can find the ‘Transfer Function’ formula used to convert the voltage to kPa. Figure 2 of the datasheet on page 4 shows the results of this formula in output voltage vs kPa.

Basically, the formula is : Vout = VS (P x 0.018 + 0.5), where VS = voltage supply.

Regards,

Jose

NXP Semiconductors