The main problem seems to be the lack of availability in the future of the dsPIC30F. I think all the current sensors out there also have 2.5v as zero amps, and then +/- x volts for positive and negative current. Everything would have to be in 0-3.3v. I guess it's not the end of the world though.
When they say "not recommended for new designs", how serious are they about that? They are going to stop making them in a few years?
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