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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...
Datasheet
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?
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    • 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?
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    Thanks for your reply.
    
			
    
			
									
		                             
                        

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

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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                on Feb 22, 2016 4:23 PM
            
            
						
			            		
        
		
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        Hi Doug,
        
 
        Thanks for your reply. I'd like to verify one additional thing. Since the start code replaces a sample (data sheet Rev. A, p.31), I take it that the data before and after the start code looks like the following, thus retaining alignment of the channels within each lane. Is that correct?
        
 
        SERDOUT1: CHA data , ChB data, ChA data, STARTCODE, CHA data , ChB data,….
        
 
        SERDOUT2: CHC data , ChD data, ChC data, STARTCODE, CHC data , ChD data,….
        
 
        SERDOUT3: CHE data , ChF data, ChE data, STARTCODE, CHE data , ChF data,….
        
 
        SERDOUT4: CHG data , ChH data, ChG data, STARTCODE, CHG data , ChH data,….
        
 
        (The data sheet indexes SERDOUT from 1.)
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Feb 22, 2016 4:23 PM
            
            
						
			            		
          
		
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          Hi Doug,
          
 
          Thanks for your reply. I'd like to verify one additional thing. Since the start code replaces a sample (data sheet Rev. A, p.31), I take it that the data before and after the start code looks like the following, thus retaining alignment of the channels within each lane. Is that correct?
          
 
          SERDOUT1: CHA data , ChB data, ChA data, STARTCODE, CHA data , ChB data,….
          
 
          SERDOUT2: CHC data , ChD data, ChC data, STARTCODE, CHC data , ChD data,….
          
 
          SERDOUT3: CHE data , ChF data, ChE data, STARTCODE, CHE data , ChF data,….
          
 
          SERDOUT4: CHG data , ChH data, ChG data, STARTCODE, CHG data , ChH data,….
          
 
          (The data sheet indexes SERDOUT from 1.)
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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