> I am confused about seperating the ranges and giving the
> output.Suggestions are welcomed.

Hi Yigit. First of all it would probably help to get better resolution -
amplify the AC up to 5V pk-pk or use Vref+

To separate the ranges, 16-bit subtraction tests and gotos would be
fairly straightforward

And for the output, a resistive divider on each pin, multiplexed
to a common point with output resistors, perhaps to a buffer
amp. Only the active output is set as such and to '1', all others
would be hi-Z

The other option would be to use PWM into an RC filter and
monitor/adjust the voltage with the ADC

You don't give all the steps, perhaps there's a logic solution using
resistors and 4066 gates

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