coherent sampling for adc

[amr hema]

hi all,
kindly, i make sar adc 8-bit and i wanna measure its dynamic performance to calculate ENOB , my max i/p frequency is 574K and fs=2Mhz

i choose Nrecord=2048 and Nwindow=585 so fin=573.3K , is this true and what's exactly method to know i.p sinwave needed in fft?
thx in advance

 

[erikl]

Try this thread which includes several useful application note links.