The ADXL355 is a powerful sensor with great specs. However, we've seen a number of failures where the sensor "latches" or gets stuck (e.g. -20 G) and experiences "permanent damage". The common explanation is the sensor was subject to an acceleration/shock condition beyond range. Or, repeated shock/vibration causing wear of the anti-stiction material and then the sensing element getting stuck at one extreme. From our experience, it is hard to replicate the problem in a lab environment. Simply subjecting the sensor to repeated shock/vibration may not lead to this failure condition. Yet, we've had sensors in the field experience this damage. And, it is hard to know what the actual shock and vibration conditions were for that particular sensor.
It looks like we're not alone. This forum has a number of other folks who experiences this. For example, see:
- Permanent damage on ADXL355
- ADXL355 shock problem. (sensor is not working)
- Q:Adxl355 data is abnormal
- ADXL355 Latch-up condition
My question is:
- How many other people have experienced this failure using the ADXL355?
- Is this truly explained by subjecting the sensor to large shock/vibration? If so, how to replicate this?
- Is there a design flaw or limitation where the sensor could still fail to do other factors? If so, what conditions should be avoided to prevent damage?
Ultimately we don't want surprises where the sensor fails and we don't know why. Any information from other ADXL 355 users or AD engineers would be appreciated.
