Thanks KaySeeks, both those articles are indeed useful.
I have some unique advantages (and disadvantages) from choosing the ad7760. its max output data rate is only 2.5 MSPS with an internal flow pass filter set to 1 MHz. the read rate is 5 MHz on a parallel bus.
This will certainly be nice for prototyping, as I might even get away with some bodge wires and standard probing techniques.
Of course, the receiver won't work above 1 Mhz, (undersampling really isn't an option with this part) But I decided to take the high frequency hit due to the relative abundance of good SDRs for hf and vhf frequencies, and the relative paucity of ones that work down to DC.
Heres hoping that a DC coupled 1 MHz receiver will be a hit with the
www.vlf.it guys, NDB dxers, and all the rest of us down here in the mud