Hello, i am very new to arduino and electronics in general so please bare with me.
I am using a peizo transducer to record vibrations when placed on a persons throat. My sampling frequency will be 9.6 Hz so to prevent aliasing i want to use a low pass filter with a cut off frequency of around 4 kHz. I am amplifying the signal before filtering.
I'm planning on using a 5th order Butterworth filter with the datasheet: http://www.farnell.com/datasheets/28720.pdf?_ga=2.75275794.1232365976.1537776269-1637501409.1537776269&_gac=1.16067074.1537783347.EAIaIQobChMIkbW5rbHT3QIVgrHtCh1OawVqEAAYASAAEgLhX_D_BwE
It says in the data sheet 'When using these devices for anti-aliasing or DAC post filtering, synchronise the DAC (or ADC) and the filter clocks. If the clocks are not synchronised, beat frequencies will alias into the desired pass band'.
Can i set the oscillating frequency of the low-pass filters clock with the arduino at 400 kHz? As this will create a cut off frequency 4kHz.
Also, is this what it means by synchronising the ADC and the filter?
Thanks for your help in advance.