Electronics > Beginners
USB 3.0 to SATA and back
AE7OO:
Hello,
I'm trying to setup a completely isolated system. Everywhere I read(outside of single ap note from Analog) various sources say that it is not possible to isolate USB 2.0 HS or any form of USB 3.0.
But I have seen at least 2 different USB 3.0 to SATA converters out in the wild. And last time I checked, SATA used LVDS as its signaling layer. And there are 3 chips from Analog alone that will isolate LVDS at 600Mbps.
So why would the following not work:
Via Tech VL713 -- USB 3 to SATA
Analog Devices ADN4651 -- LVDS isolator with a max data rate of 600Mbps
USB 3.0 cable --> USB 3.0 socket -> usb 3.0 --> VIA VL713
--> LVDS --> AD4651 --> LVDS -->
VIA VL713 --> usb 3.0 --> usb3.0 socket --> usb 3.0 cable
Yes, it is a little round about and limited to 600Mbps, which is still MUCH faster than the current USB limit of 12Mbps.
With some attention to detail and not doing anything stupid, I don't see any problems.
VL710/3/6 $3 - $5 -- AliExpress -- https://datasheet.lcsc.com/szlcsc/VIA-Tech-VL716-Q4_C69727.pdf
AD4651 $10 -- Mouser -- https://www.analog.com/media/en/technical-documentation/data-sheets/ADN4650-4651-4652.pdf
The board would cost around $40 to make, I think.
Should this work :-+, or am I digging a whole I can't get out of?? |O
DC1MC:
Get two of these 4KV isolated babies and mount them head to head, problem solved:
https://www.coolgear.com/product/gigabit-ethernet-usb31-gen1-adapter-4kv-isolation-mounting-kit
As software use the nice and delicate USB over Ethernet drivers for Windozer:
http://www.usb-over-ethernet.com/
Linux has this:
http://usbip.sourceforge.net/
It will be like 169 times easier than fidgeting with SATA drivers and 2096 times more portable and supported..
Cheers,
DC1MC
It will be like
ogden:
--- Quote from: AE7OO on April 24, 2019, 04:50:02 am ---Should this work
--- End quote ---
No. USB to SATA converters are not just physical interface converters. You can't connect such back to back and expect that signals will go through. They won't.
--- Quote ---Everywhere I read(outside of single ap note from Analog) various sources say that it is not possible to isolate USB 2.0 HS
--- End quote ---
Have you tried to search for actual USB 2.0 HS isolator product?
magic:
In addition to what everyone said so far:
--- Quote from: AE7OO on April 24, 2019, 04:50:02 am ---SATA
600Mbps
--- End quote ---
Ahem.
David Hess:
USB to fiber converters exist for extended range applications which could be used for galvanic isolation.
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