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

[rellutzu]

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]

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]

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

HCPL-2400 can handle 20 MBd.

 

[IanP]

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

High-speed optocouplers:
**broken link removed**

Regards,
IanP