Voff change of MPX5999D

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Voff change of MPX5999D

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slsl-1979
Contributor I

During the use of pressure sensor MPX5999D, Voff will drop from the typical value of 0.2V to 0.13v. What are the factors influencing the change of this value? Can it be avoided? The above phenomena are found in the core of the pressure sensor products now. It took nearly 10000 pieces to find out.

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slsl-1979
Contributor I

Hi,Tomas

Thank you for your reply.

Now our circuit can't be changed temporarily. So I want to know the probability of this change.

We need to provide a report to our customers. Thanks!

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Li,

There are not any documents/reports that would provide further information on that, unfortunately.

Best regards,

Tomas 

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TomasVaverka
NXP TechSupport
NXP TechSupport

Hi Li,

As described in the AN1636, sources of offset errors are due to device to device offset variation (trim errors), mechanical stresses, shifts due to temperature and aging. It is recommended to perform auto-zero in order to correct the sensor output for long term offset drift or variation.

Best regards,

Tomas

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