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20Mhz optocoupler->alternate solution for galvanic prot.?

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rellutzu

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Hello all!
I want to make a galvanic isolation interface using an optocoupler!
The problem is I need to enssure a 20Mhz freq of data.
I couldn't find such a high speed opto?

Does anyone have a clue?
What about an alternate solution?
 

artem

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digitizing and sending it via optical cable is much costly. Or you can shift the signal to somewhere 900 MHz by Am modulation and use trans for coupling . I dont know whether synchronous detection is widely used at that frequency - may be you can supply carier through another trans and use it for synchronous detection on receiving side - that should improve linearity for low level signals.

Search the forum there was similar topic on that issue .
 

XNOX_Rambo

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Re: 20Mhz optocoupler->alternate solution for galvanic pr

HCPL-2400 can handle 20 MBd.
 

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