I am working on a solar system monitoring project in which the pwm charge controller has isolated input, battery and load. I put input on A0-A1 and the load on A2-A3... how does the hardware keep the 2 sources separated/ isolated because it looks like the PGA can only read one pair at a time? For the testing I have done it seems like the mux reverts from differential to single ended, shorts when switching or something where the chip gets damaged.
Is there some trick in Software that keeps one mux pair open when the other is being read or something else? And or goes to both open then close one as needed?
Or should I be using 2 different ads1115 to read 2 power sources that must be kept isolated? I am also having an issue with my 3rd ads1115... I have 3 running to Arduino uno r3. 0x4a gives me problems in programming and always returning -1.
None of the documents i can find give me a reference for the Arduino as to a list of programming commands and the command arguments for this chip... I believe it is an Adafruit library but of no help.. any ideas?