At 05.34 2005.05.01 -0700, you wrote:
>Hi,
> 
>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?
> 
>Thanks,
>Laura

Hi Laura,
you will destroy the chip if you attempt that. Rather, use the chip with
its natural 0-5V range, and place a resistor voltage divider in front of
the interface, much better use an opamp as a buffer with 0.5x gain.

Ciao.

 
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