Re: a/d converter,

Well i am going to have to start from scratch.
I would have  POT that would regulate 5 volts and i need to get it as
accurate as possible. The resolution of the the ADC should be 2^9=512,
which would give me a quantizes a voltage to .01Volts

Diagram:

POT ----> ADC converter Chip ----> BCD priority encoder -------->
Parallel port.

Does this make sense ?
Does he ADC need a frequency to operate. i am not sure because the ADC
would requires sample therefore by increasing the frequency you have
increasing the sample rate or can you get away without adding a
frequency to the IC ?