Thanks - I guess hadn't seen the latest AN.
So, an external Nyquist filter is indeed needed if a lower clock frequency than 16 MHz is used. Is there by any chance an AN on a tunable lowpass filter available somewhere on the AD site? I guess I can make do with 3 additional filter stages at cutoff frequencies 2, 10 and 40 kHz.
Doesn't hurt to ask, I guess....
Regards,
Ronni