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ADuM3160 Production
The ADuM3160 is a USB port isolator, based on Analog Devices, Inc., iCoupler® technology. Combining high speed CMOS and monolithic air core transformer...
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ADuM3160 on Analog.com

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ADUM3160 USB3.0 compatibility problem

		
	
				

			

									
					    inventis
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 28, 2013 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    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?
    
			
    
			
									
		                             
                        

    
    
                                            
                 Digital Isolation Technology
                
                                                    
                 usb3.0
                
                                                    
                 USB isolators
                
                                                    
                 usb
                
                                                    
                 adum3160
                
                                        
                                            
                
                
                                
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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jan 6, 2014 7:45 PM
            
            
						
			            		
      
		
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      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
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Jan 6, 2014 7:45 PM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      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
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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