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ADUM3160 USB3.0 compatibility problem

Hello, I'm using an ADUM3160 USB isolator in my project.

I'm facing a usb enumeration problem when I connect the USB to a USB 3.0 port (RENESAS USB 3.0 HOST CONTROLLER).

If I connect the pheripheral to an USB 2.0 port I don't have problem.

I removed the ADUM3160 from the PCB and I don't have any problem.

Has anyone faced a USB 3.0 compatibility problem till now?

  • Hello Inventis

    We have not seen compatibility issues with USB3.0 controllers.  However we have not done extensive testing on these controllers.  The USB3.0 portion is a parallel communications bus that runs at very high speed, and the standard USB2.0 portion should enumerate through our device. 

    I looked over your schematic, It looks good except for the addition od 22pF caps to ground on the D+/D- lines.  Why are those devices present?

    Have you looked at the signals on D+ and D- during enumeration?  If so, can you send me some scope captures?

    Best Regards,

    MSCantrell

    Best Regards,

    Mark Cantrell

  • This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

    Thank you,
    EZ Admin

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