I'm looking to pass a, i2c bidirectional data signal between two systems that have about 2kV voltage difference between their respective "grounds". I can find several device on, say, Mouser's website but I'm getting lost with all the insulation terms. There is a variety of test voltage conditions like "Vrms for 1 minute" and "galvantic isolation in kV". These voltages are typically 4 - 6kV. But I also find "Maximum working insulation VIORM 566 voltage" - so does this mean a normal working voltage difference? And so well less than 2kV.
Sorry, but I need an idiot's (that's me) guide to what isolation voltage I should be looking for to isolate these systems that live 2kV apart? I know there are solutions that use multiple optoisolators and drivers but I was looking for a single chip solution. Any helpers please?
(The application is between a microcontroller and the cathode circuit of a CRT so it is almost on topic.)
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