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MMA8653FCR1 z-Axis stuck high

Question asked by Leonardo Leone on Jan 24, 2019
Latest reply on Jan 25, 2019 by Tomas Vaverka

Hello,

 

We are using the following accelerometer MMA8652FCR1 since quite a time now (more than 3 years). As we had some supply management issues we used the MMA8653FCR1 as a second source and are now facing quality issues with this device. A detailed in-house analysis is ongoing to check which parts are affected.

 

The MMA8653FCR1 is facing the following problems

1) We have the problem that z-axis (most of the problems) is stuck high at a value of 2048 (Hex 0x800) ( for quite a percentage of the devices  (between 5 to 10%)

2) We can eliminate this issue by a small shock. So it's a physical issue, not a software bug.

 

Do you have any ideas, where this issue comes from or did you ever had similar issues with this device?

 

Best Regards Leonardo

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