hopefully final video update. The filter is for half mclk frequency of 12.288 ( 6.144mhz )
some interesting notes on buffer filtering for ADC here..
I was looking at frequency ranges just above audio but the filters job is to cutoff anything from 6mhz and higher !
update simulation using opa1637 as the preamp buffer to ADC.
better results in simulation at least.
Why I can't use the OPA1632 to attenuate the PG2500 with +/-5v power rails
OPA1602 attenuation and low 6mhz low pass filter