Hi All,

I'm using the PIC 16F877's ADC unit to determine voltages, and I want a
Vref+ of 24V.  Is this possible?  The datasheet seems to say no, but I'm not
sure.  The maximum value of Vref+ is stated as AVdd + 0.3, but I'm not sure
what "AVdd" is.  What is meaning of the "A" in AVdd?  Then again, the spec
also says that Vref+ - Vref- can be no more than Vdd + 0.3.  Correct me if I
am wrong, but it seems that I cannot use a 24V input direct to the ADC.  I
suppose I'll have to use a voltage divider to get the input's max to
something within specifications, but is there a better way?

Thanks,
-Mike

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