Hi, all:-
Any suggestions for a really good low frequency (up to a few hundred Hz would be great) 24+ bit ADC box with very low low frequency noise and drift? Preferably something like 20-30ppb RMS noise from 10uHz to
1Hz, with at least two-four channels input (that's roughly a true 20 bits at 1kHz).The usual NI boards and their clones have really high low frequency noise and others have low drift but a bit too high a noise floor.
I don't really want to build something here (that will come later). Any suggestions would be most welcome. A few K$ would be fine.
Best regards, Spehro Pefhany