18F25K42 ADC Input Impedance Changed
We have a product that uses an 18F25K42 and I noticed that a new, no longer preliminary, data has been released. The preliminary data sheet listed a maximum recommended ADC input impedance of 10K and the new datasheet lists a maximum of 1K. The 10K number is what I have seen for most newer 8-bit PIC's. I would feel a lot better if I knew why the spec was lowered? I would have expected to see an increase in pin leakage current as well but it is listed the same in both datasheets.
I see an Errata issue that effects silicon A1 where they recommend 1K max impedance as a work around but, since A2 fixes that issue, I can't imagine the datasheet would have been changed for that.
Does Microchip ever answer in these forums or do I need to submit a support ticket?