Hi - I would like to have more information about the digital hpf built-in in the AFE5801 (type, bode plot) or any information to help to characterize the filter.
The datasheet gives the time domain formulas: y(n)=2^k/(2^k+1)[x(n)-x(n-1)+y(n-1)] with k controlling the corner frequency configurable 0 to 15 (4bits). It would help to have the frequency domain transfer function.
thx
Ok - I found the origin of the formula: http://en.wikipedia.org/wiki/High-pass_filter.
thx anyway