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ADuM3160 ESD Test Error

Question asked by Kazu on Dec 15, 2017
Latest reply on Jan 17, 2018 by MSCantrell

Hi,

 

Our customer carried out ESD test as attached but ADuM3160 seems not to withstand over +/-2kV.

When over +/-2kV ESD is applied, USB communication fails. Customer tried to test several samples and all of

them could not withstand over +/-2kV. (+/-4kV is must spec for the customer)

 

Customer also tried to remove ADuM3160, connect DD- and UD-, DD+ and UD+, GND1 and GND2 and short L508,

and then tested same thing, USB communication did not fail until +/-7kV.

Customer's schematic and PCB layout around ADuM3160 have any problem? 

 

Regards,

Kazu

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