BNO 055 abnormal spikes in ACC GYRO and Euler

[huxinyao1986]

Hi, we are having problems with our BNO055, 

Our MCU is STM32F072CBU6\QFN50P700X700X80-49

work under NDoF

There are abnormal spikes  even if the sensor is putting still and not moving. However, when the sensors are moving, there are much more spikes.

I understand there were similar problems spoted by other users. but ours seem more serious. Our circuit is blow

https://community.bosch-sensortec.com/t5/MEMS-sensors-forum/BNO055-spike-of-Linear-Acceleration-and-...

[BSTRobin]

Hi huxinyao1986,

Did you design a new project with BNO055?

[huxinyao1986]

yes， it is new.  Any idea where might be wrong?

We did a few more tests in recent couple of days.

1) we confirmed that if the sensor stays still (not moving), the number of spikes were significantly reduced.  When it is moving, there are much more spikes there.

2) we tried remove the battery, and instead using the USB to supply power.  The number of spikes were reduced (see figures below).  Our guess is that something might go wrong with power supply circuit. But we re-examine our circuit design, we cannot find any wrong-doing. Could you help us to check it ?  (we posted our circuit design)

[BSTRobin]

Hello huxinyao1986,

BNO055 is not recommended for use in new designs.
You could use the combination of BHI260AP+BMM150.