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MPX53DP voltage output

Question asked by Jordan Silverman on Jan 15, 2019
Latest reply on Jan 16, 2019 by Jordan Silverman

According to the datasheet for the MPX53DP differential pressure sensor, the output voltage should be in the range of 20-80mV, proportional to the differential pressure.

 

I have set it up with a 3.3v power supply and was expecting to need an amplifying circuit but at a differential pressure of 0 (both nozzles are open), the output voltage is 1.75V. However, when I apply pressure, the voltage rises as expected in the datasheet.

 

So my question is this: How do I have an offset of 1.75V when it should be 0.02V?

 

Thank you in advance for your help

Jordan

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