ASM330LHH is reading wrong measurements at some temperatures even if BDU activated

JamesWindspoore · ‎2023-12-19

I am leading a project in the automotive sector where we are using the ASM330LHH for mass production (we have assembled more than 2000 units). Our reading method involves not using the DATA-READY or interrupt; instead, we read at a rate of 417 Hz with our microcontroller's clock. To verify that the temperature compensation meets our quality standards, we conduct a temperature test ranging from -30 to 95 degrees on all units. During testing, we've observed that approximately 40% of the units exhibit spurious measurements at a specific temperatures. This issue is reproducible over time; repeating the test with the same unit consistently shows problems around the same temperature. These anomalies are spikes, consistently appearing in the X and Y-axis gyroscopes but never in the Z-axis gyroscopes or accelerometers. The BDU register is activated. I would like to understand why these issues might be occurring, as they significantly impact production. Thank you

Federica Bossi · ‎2023-12-20

Hi @JamesWindspoore ,

Welcome to ST Community!

Can you share some plots of your acquisitions with this strange behavior you have detected?

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JamesWindspoore · ‎2023-12-21

Here you can see how the peaks are produced only in x,y (never in z) at very specific temperatures

Federica Bossi · ‎2023-12-22

Hi @JamesWindspoore ,

Thanks for the plot, however is a little bit difficult from this image understand what happens.

Can you kindly share also the raw data and your settings (FS, ODR, BW ecc)? Thanks

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