BMP388 anti-aliasing

[jhochs]

I am using BMP388 sensors to measure fluctuant pressures and want to ensure the spectra are not aliased. How does the BMP388 prevent aliasing? Is there an anti-aliasing filter prior to ADC?

[BSTRobin]

Hello jhochs,

For "fluctuant pressures", could you give more description about it?

[jhochs]

Thanks for the reply. Measuring turbulent wind pressures at 12.5Hz. So turbulent spectra will be constructed up to the Nyquist frequency 6.25Hz. An anti-alias filter would prevent frequencies higher than this being folded back on the spectrum.

[BSTRobin · Accepted solution]

Hello jhochs,

For the BMP388, when start to initialize the sensor we always set up the sampling rate for pressure and temperature. Also we have ODR for output data rate which can be achieved from API. You could adjust the frequency of ODR based on their application to avoid aliasing.