Offset issue with MEMs Sesnor LIS2DW12TR
Dear all,
We are using the LIS2DW12TR on a custom PCB and have observed significant offset errors on the Z-axis, reaching up to ±20% of full scale.
The sensitivity appears to be correct; however, instead of measuring the expected values of +1 g and −1 g, we obtain readings such as +1.17 g and −0.83 g. This suggests a substantial offset while the sensitivity remains largely unaffected.
The X- and Y-axes do not exhibit this behavior and remain within specification.
The most unusual aspect is, that the offset is not stable. It changes very slowly over time, typically over a period of several days, without any intentional modification of the hardware or software configuration.
Has anyone experienced similar behavior with the LIS2DW12TR or identified possible causes such as PCB stress, assembly process effects, flux contamination, humidity, temperature exposure, or aging effects?
Any recommendations for further investigation would be greatly appreciated.
Best regards,
Reto
