Hello Mark,
Thank you for the answer.
I'll wait for the additional detailes regarding to question 3.
Regarding to question2, Regarding your question of the current through the digital
potentiometer: I don't think that the maximum absolute rating would help in
this case, as we have this current while the potentiometer is turned off, and
not when it is biased. The currents we're talking about the currents on R digipot
which are in order of magnitude of micros-amperes.
Regards,
Meir