Hi,

On Sun, May 01, 2005 at 05:34:27AM -0700, laura capaldi wrote:
>
> I'm planing to use the A2D functionality of the 12F675 to convert 0-10V
> out to a 0-1024 range, 10 bit A2D conversion. Everything on the 12F675
> looks good for that. My question is whether I have to supply a 10V for
> Vref/GP1/AN1 or is there a way to scale VDD internally such that I can get
> a 0-10V mapping on the A2D conversion that is performed on AN0?

You will have to scale down the 0-10V signal in some way. Vref can only
exceed Vdd by 0.3 volts. Using a voltage divider made from precision
resistors would be the easiest way to do this.

Matthew

-- 
"Every sensible man, every honest man, must hold the christian sect in
horror. 'But what shall we substitute in its place?' you say. What? A
ferocious animal has sucked the blood of my relatives. I tell you to rid
yourselves of this beast and you ask me what you shall put in its place?"
        -- Voltaire
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