Hi,
The sampling rate of the ADC for BMI160 and BMI270 accel and gyro is much higher, for example 100KHz. Through the down-sampling and low pass filter BMI160 and BMI270 accel and gyro can output data at each ODR.
For example, when you set BMI160 or BMI270 gyro to 800Hz ODR, in normal mode the 3dB cutoff frequency is 300Hz. This means that the frequency of the input data to the low pass filter should be at least 1.6KHz to avoid aliasing.
When you set to OSR2 mode, the 3dB cutoff frequency becomes about 150Hz which is half of the cutoff frequency in normal mode. In order to avoid aliasing, the the frequency of input data to low pass filter should be at least 3.2KHz.
Similarly when you set to OSR4 mode, the 3dB cutoff frequency becomes about 75Hz which is one fourth of the cutoff frequency in normal mode. In order to avoid aliasing, the the frequency of input data to low pass filter should be at least 6.4KHz.
Thanks.
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