In a recent batch of 40,000 units of a wearable with the ICM-20948, we're seeing stiction of the accelerometer. Specifically, in approximately 7% of devices, the z-axis accelerometer will stick at -15G. A knock or tap can 'unstick' it. The device seems to go into this state either after impact or vibration.
Has anyone else seen this issue with the ICM-20948? It seems to be a similar issue to what has been reported on the NXP forums here.
The batch is from 2021 (I can dig out the the date code). More recent batches seem to still have the issue, but at a reduced rate. We have contacted TDK and our distributor but are not progressing very far.
Could you please also use this link to contact us?
https://invensense.tdk.com/developers/support/