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MPX5050DP sensor problem

Question asked by Jim Butcher on Aug 13, 2016
Latest reply on Sep 1, 2016 by Jose Alberto Reyes Morales

I am trying to use a MPX5050DP sensor.  I am using a MC7805 three terminal regulator to convert 12VDC to 5VDC.  I have connected 5VDC to pin 3 (Vcc) and ground to pin 2.  When I measure the voltage at pin 1 (Vout) with no differential pressure, I observe about 2VDC.  From the datasheet, I expect nearly 0 VDC.  When I blow into the sensor, the voltage changes only .1 or .2 VDC.  I have experienced this with two different MPX5050 and with a MPXV5050DP.  Why isn't the output 0 (or actually .2) with no differential pressure?