I have this:
* About to use internal AREF (bandgap)
I need the AREF/2 voltage in order to sample audio signal having the "zero" on between min/max values.
Can I derive this AREF/2 voltage directly from the AREF pin with resistor divider ?
How much does the AREF pin tolerate loading when using the internal reference ?
I have searched the forun and I am sure there is an answer hiding somewhere as this just MUST have been done before. Unfortunately the unclear subjects did nothing in helping to find the correct thread.
The data sheet had very little information on this subject.
Another option would be to use PWM to create the AREF/2 and stabilize it by measuring by another ADC channel.