BMI270 3dB Cutoff

[mgchoi]

Hi, Bosch

There is information about BW according to ODR below.
I wonder exactly what the difference between ODR and BW is.

I wonder why it's good to set the 3dB Cutoff.
Also wondering why BW goes down from 751Hz to 721Hz when Gyro ODR goes up to 25~3,200Hz and then Hz goes up from 3,200Hz to 6,400Hz.

 

Thanks

[BSTRobin · Accepted solution]

Hi mgchoi,

After our internal check, there are different filters used at 3.2kHz and 6.4kHz ODR. IIR filter was used at 6.4kHz ODR, so the 3dB cutoff frequency will be lower than the cutoff frequency at 3.2kHz.