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ADV7511W Recommended for New Designs
The ADV7511W is a 165 MHz High-Definition Multimedia Interface (HDMI™) transmitter, which is ideal for automotive infotainment applications. The digital...
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ADV7511W on Analog.com

ADV7441A Not Recommended for New Designs
The ADV7441A is a high quality multiformat video decoder and graphics digitizer with an integrated 2:1 multiplexed HDMI™ receiver. The ADV7441A contains...
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ADV7441A on Analog.com

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Noise in the DVI Output of ADV7511W



		

			

									
					    NanjundaM
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 2, 2016 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
    We are using ADV7511WBSWZ for DVI Output in our board. The set up is as shown in the attached image.
    
 
    The cables used for connection are shielded.
    
 
    We have observed that, there are white blinking dots on the output (On Monitor).
    
 
    We tried to display only one primary color(any of the three) bar on the screen, with darker color the dots are not visible, but with lighter shades of the same color( with mix of other two primary color) dots are visible.
    
 
    Have anyone have come across this kind of issue ?
    
 
    Please help us to solve this issue ASAP.
    
 
    Thanks & Regards,
    
 
    Nanjunda M
    
								
    

							
    
				
				
			
    
					
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Jun 20, 2016 8:14 PM
            
            
					
        
	
        

		
		
        
					
        Hi,
        
 
        We integrated the card in the system. The block diagram explains the situations after integrating the card 14 in the system.
        
 
        I have added block diagram of two situation.
        
 
          
  
        • Discontinuity at one location on external cable: Noise reduces completely
          • 
  
        • Discontinuity at two location on external cable: Noise still remains.
          • 
 
        
 
        Please can you look at the block diagram and comment on observation on noise.
        
 
        As per your below reply, touching pins add small capacitance.. can adding high frequency capacitor, btn pins will be helpful?
        
 
        Any suggestion on attending this type of noise?
        
 
        Regards,
        
 
        Vijetha
        
 
        
 
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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Reply

        


      • 
	
        



	
		
	
	



        
	
        
		
        
							
					
        
		
        
			
													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Jun 20, 2016 8:14 PM
            
            
					
          
	
          

		
		
          
					
          Hi,
          
 
          We integrated the card in the system. The block diagram explains the situations after integrating the card 14 in the system.
          
 
          I have added block diagram of two situation.
          
 
            
  
          • Discontinuity at one location on external cable: Noise reduces completely
            • 
  
          • Discontinuity at two location on external cable: Noise still remains.
            • 
 
          
 
          Please can you look at the block diagram and comment on observation on noise.
          
 
          As per your below reply, touching pins add small capacitance.. can adding high frequency capacitor, btn pins will be helpful?
          
 
          Any suggestion on attending this type of noise?
          
 
          Regards,
          
 
          Vijetha
          
 
          
 
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

          • 


        


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