Potting an accelerometer (LIS2DS12)

[KOlso.1]

I'm wondering if there are any concerns with acceleration measurement offsets and extra noise due to strain on the package from encapsulating it or potting it. I'm specifically looking at the LIS2DS12 if different packages have different answers to this question.

[Eleon BORLINI]

Hi @KOlso.1​ , please note that if you apply any strain to the LIS2DS12 accelerometer package, the offset of the device (but not the noise) will be probably affected. To compensate this effect, you can act in two different ways (since this device has no open dedicated register for the offset compensation):

• [recommended] Software compensation: you characterize the induced offset and you subtract it in post-processing to the sensor data output;
• High-pass filter application on data out: FDS_SLOPE bit of the CTRL2 (21h) register allows you to enable a high-pass filter data selection on output register and FIFO, but in this way you will lose the DC accelerations that are signal and not noise.

Regards