I am a decently advanced user of ATTinys, but I've hit a snag. I am attempting to use the differential ADC on an ATTiny85. If I do a unipolar differential conversion using ADC2 on both the positive and negative side, it gives me a value of 2-3. This seems normal and expected. Both the positive and negative are the same, so it should be close to 0. If I set the Bipolar Input Mode flag, with the same inputs, it gives me around -310. This value should be around -3v, which seems way off. I noticed when reading ADC2 in single ended mode with the BIN flag still set, the value was off by a couple hundred vs with the BIN flag cleared.…