[sdiy] AD/DA schematics? quantizers,etc

[Dan Snazelle]

ok



i feel like a fool

in all my reading and testing today i had somehow missed the fact that
on an ADCchip, the vref cant go below grnd (or not much below)



so i am confused. usually when i see a - sign i think of putting the
negative rail. but in this case it seems you pick a top voltage and a
you pick a bottom but that has to be within 0-vref



is this correct? and the vcc is always 5volts?



how high can the vref be?



a few people have mentioned that for cv, i want a 10v vref.



would a high vref be useful for audio as well? or a lower vref useful even?



thanks