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Correct, you'll need to scale down the voltage so it gets within the specs of the chip in general as well as the ADC.
And those 0.3V is the voltage drop across the protection diodes on the pins. As soon as the voltage on the pin goes above Vdd+0.3V the diode gets forward biased and "shorts" the input to Vdd - basically.
/Henrik.
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More and more I work with the PIC I am having more respect for it. They are designed very well especially for newcomers and people who don't read the manual unless it doesnt work. I will redesign my analog inputs then to spec then.
Why is the email address verification case sensitive?
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