So, how come they don't make opto isolators in itty bitty SMD parts. This 16 pin 2.54mm spaced part is the biggest thing on the board.
I don't know why I bought the through-hole version rather than the smd version. They're the same size.
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One of the issues is physical separation, inside, for voltage arc-over isolation.
Analog Devices makes some isolators, non-optical, in smaller packages, I think. They use coupled inductors and internally chop the signal. They are pretty good, quite fast, but more expensive.
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The Analog Devices [iCouplers] are capacitively coupled, not inductively [several manufacturers make capacitive digital isolators]. They are pretty large too, for the same reason... you need distance between the sides to prevent arc-over.
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shf6916 -- Somebody DOES make one. Wow. Costs twice what the processor costs
Optocouplers in SOIC are not uncommon.
Yes but considering that the opto is buffering the nasty world from the serene world of the micro shouldn't it be paid more ? ;)
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There is sometimes grounding trouble between the remote control receiver and the sound system, so I'm including an opto coupler so there is no need for a common ground between the two.
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