MPX5100 Voltage pins - Vout, V1, V2, Vex

[masoandro]

Hi there,

I have been trying to test a few MPX5100DP units I received for calculating air flow. With a similar differential sensor I am able to see the expected pressure values. However, I cannot get Vout to change from its base voltage of 185/200mV.

What is the purpose of V1, V2 and Vex and what do they correspond to? I'm sorry to ask, but I could not find an explanation for those pins in the datasheet or various application notes I found.

Thank you for your help.

[david_diaz]

Hello Andrew,

Thank you for writing.

In this case, V1, V2 and VEX pins are used for factory trimming and it is recommended to leave these pins unconnected.

Can you please share your schematic? How are you connecting the MPX5100DP device?

Regards,

David