Use SPI protocol, then you only need 3 optos with simple drivers, no bidirectional stuff. For isolation, use cheap jacketed polymer fibre optic, about $1 a metre, with matching detectors & transmitters $2 each or so.
Tom Harris <[email protected]> On 1 December 2013 05:13, Grahame Marsh <[email protected]>wrote: > > 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.) > > Grahame > > -- > You received this message because you are subscribed to the Google Groups > "neonixie-l" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send an email to [email protected]. > To view this discussion on the web, visit https://groups.google.com/d/ > msgid/neonixie-l/529A2AD3.8030705%40googlemail.com. > For more options, visit https://groups.google.com/groups/opt_out. > -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/CAHjG12RS9q6dTb8iTg15ZNHfZrJ0-KLk%3D8cWKthuy8dT7zOeTQ%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
