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AD9675 Recommended for New Designs
The AD9675 is designed for low cost, low power, small size, and ease of use for medical ultrasound. It contains eight channels of a variable gain amplifier...
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AD9675 on Analog.com

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AD9675 start code

		
	
				

			

									
					    tonyle
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 18, 2016 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    I'd like to clarify how the AD9675 start code is overlaid onto the data stream; specifically:
    
 
      
  
    • Does the start code appear once per channel or once per lane?
      • 
  
    • If the latter, does it always appear on the lower channel (i.e., A on SERDOUT1, C on SERDOUT2, etc. assuming four-lane mode), upper channel, or either channel?
      • 
 
    
 
    Thanks for your reply.
    
			
    
			
									
		                             
                        

    
    
                                            
                 start code
                
                                                    
                 High Speed A/D Converters >10 MSPS
                
                                                    
                 Standard High Speed A/D Converters
                
                                                    
                 ad9675
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Feb 19, 2016 10:10 PM
            
            
						
			            		
      
		
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      Hi Tony,
      
 
      Thank you for your interest in AD9675. The engineer who knows about this part is out-of-the-office today. I'm filling in and I'll pass along the information I've been able to gather.
      
 
        
  
      • The Start Code appears once per lane.
        • 
  
      • It appears before the first (or as you say, "upper") channel's data.
        • 
 
      
 
      In other words, for 4-lane mode:
      
 
      SERDOUT0: STARTCODE, CHA data , ChB data, ChA data, ChB data,….
      
 
      SERDOUT1: STARTCODE, CHC data , ChD data, ChC data, ChD data,….
      
 
      SERDOUT2: STARTCODE, CHE data , ChF data, ChE data, ChF data,….
      
 
      SERDOUT3: STARTCODE, CHG data , ChH data, ChG data, ChH data,….
      
 
      Thank you.
      
 
      Doug
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Feb 19, 2016 10:10 PM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi Tony,
      
 
      Thank you for your interest in AD9675. The engineer who knows about this part is out-of-the-office today. I'm filling in and I'll pass along the information I've been able to gather.
      
 
        
  
      • The Start Code appears once per lane.
        • 
  
      • It appears before the first (or as you say, "upper") channel's data.
        • 
 
      
 
      In other words, for 4-lane mode:
      
 
      SERDOUT0: STARTCODE, CHA data , ChB data, ChA data, ChB data,….
      
 
      SERDOUT1: STARTCODE, CHC data , ChD data, ChC data, ChD data,….
      
 
      SERDOUT2: STARTCODE, CHE data , ChF data, ChE data, ChF data,….
      
 
      SERDOUT3: STARTCODE, CHG data , ChH data, ChG data, ChH data,….
      
 
      Thank you.
      
 
      Doug
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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