[sdiy] AD/DA schematics? quantizers,etc

mark verbos mverbos at earthlink.net
Thu May 14 05:50:17 CEST 2009


I would think you'd want to use that 10 volt ref and shift your audio  
to be around 5 volts instead of around ground. You can then shift it  
back after the converter or just AC couple the output...

mark



On May 13, 2009, at 11:38 PM, Dan Snazelle wrote:

>
> 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
>
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