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Old 05-20-2010, 04:21 AM
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vinodquilon vinodquilon is offline
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Post isolation amplifier using optocoupler and op amp

Can anybody give circuit of isolation amplifier using optocoupler and op amp
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Old 05-20-2010, 04:56 AM
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Well, optocouplers generally aren't very linear - they're either ON, or struggling to turn off. This isn't exactly the case, but once you've fiddled around with optocouplers/optoisolators for awhile you will find that the turn-off time can seem to be an eternity.

If it's an option, convert the analog data to digital, and then send it through an optocoupler/optoisolator. You'll eliminate many problems by doing that.
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Old 05-20-2010, 05:16 AM
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Originally Posted by vinodquilon View Post
Can anybody give circuit of isolation amplifier using optocoupler and op amp
You could use a IL300.

App note:
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