MPL3115A2 accuracy clarification

danielepaesani — Tue, 03 Feb 2026 21:23:46 GMT

Hello,

i would like some help to clarify the +- .4kPa absolute accuracy parameter in the MPL3115A2 data sheet: has this accuracy to be intended as an offset error which stays constant over the whole measurement range? I need to measure not an absolute pressure but pressure intervals over time, so, on reading P1 and P2, i wouldn't mind an offset error, as long as it stays constant for both readings, cancelling itself out during the calculations. Conversely, a variable uncertainty (of -.4 to + .4 kPa) on every reading wouldn't be acceptable. So, is the true pressure accuracy for differential readings the +-.05 kPa stated on the data sheet? Is the "pressure absolute accuracy" an offset error, constant over the rated pressure range?

Thanks and best regards,

Daniele Paesani

PS I am aware that other sensor with different ranges/methods may seem to be better suited for this application.

Re: MPL3115A2 accuracy clarification

TomasVaverka — Mon, 04 Sep 2017 08:55:33 GMT

Hello Daniele,

Yes, the absolute pressure accuracy of ± 400 Pa is an offset error within the pressure range from 50 to 110 kPa and over the specified temperature range.

Take a closer look at chapter 6 of the AN4528 describing this in more detail.

Best regards,

Tomas

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MPL3115A2 accuracy clarification

Re: MPL3115A2 accuracy clarification