Why not just make your own optocoupler? Fill a lexan or acrylic 10 cm tube with clear, slow-setting epoxy and then affix an IR led on one and a darlington phototransistor on the other end, with these two components serving as end plugs for the epoxy. Then paint the unit black with a low-voc paint. The resultant construct will offer over 100KV of permanent breakdown voltage immunity. You'll need to make several of these for I2C functionality. Alternatively, consider a micro power wireless local area network, with an rf link serving as the data channel. Place two bi-directional I2C transponders in a Faraday-shielded container, with 1 cm ceramic mounting posts for each transceiver board, along with HV glass passivated feed-throughs to make a permanently isolated HV hardened / isolated construct. Optionally, fill the whole cavity with Sylgard 184 (and let cure for 4 hours at 60C) when assembled for the ultimate in dielectric breakdown immunity.
-ub On Sun, Dec 1, 2013 at 3:48 AM, Grahame Marsh <[email protected]>wrote: > On 01/12/2013 01:22, David Forbes wrote: > >> On 11/30/13 11:13 AM, Grahame Marsh wrote: >> >>> >>> I'm looking to pass a, i2c bidirectional data signal between two systems >>> that have about 2kV voltage difference between their respective ... >>> >>> >> Grahame, >> >> A quick Google search turned up this HP (Agavo) app note. It may or may >> not help. There are amusing graphs of volts vs hours of lifetime. 2KV is >> usually at 10 hours. >> >> http://www.avagotech.com/docs/5989-0802EN >> >> > David > > Thank you for the paper it has helped a lot - if I have read it correctly, > the best performance is a catagory 3 opto coupler can stand off 1kVDC for > > 100 000 hrs. So it looks like my search for a part ends 'cause there is no > such part... back to the drawing board. > > Cheers 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/529AF7FA.5000100%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/CANX%2BaJgnHWoVXYdHpSWOeQFurPqGkjNp_9GAFm8C00GBLYJ5rQ%40mail.gmail.com. For more options, visit https://groups.google.com/groups/opt_out.
