Products Mentioned

ADAV803 Production
The ADAV803 is a stereo audio codec intended for applications such as DVD or CD recorders that require high performance and flexible, cost-effective playback...
Datasheet
ADAV803 on Analog.com

Associated Drivers

  • State Verified Answer
  • Replies 1 reply
  • Subscribers 45 subscribers
  • Views 500 views
  • Users 0 members are here
Options 

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

		
ADAV803 SRC clock question

    
		

			

									
					    rmauro
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 11, 2015 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Table 2 on page 4 of the ADAV803 datasheet lists SRS MCLK Min = 138 x Fsmax but the text on page 21 states "The SRC master clock is expected to be equal to 256 times the output sample rate."   These appear to be conflicting statements..  Please help me understand.
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 adav803
                
                                                    
                 sample rate converter
                
                                                    
                 Integrated/Special Purpose A/D Converters
                
                                                    
                 Audio CODECs
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
			
		
	



      
	
      
		
      
							
					
      
		
      
			
													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      •  Super User  
      
            
						
                            
            
            				
            
                on Jun 11, 2015 7:28 PM
            

            
					
      
	
      

		
		
      
					
      Hello Rob,
      
 
      I had this same question come up about a month ago and I looked into it. I wish I had a more definitive answer but I do not know for certain. This part was designed long ago and the design team has been split up long ago. There are some things I do know. The basic ASRC design was copied from the design that Bob Adams did on the AD1896. That part does not have this constraint but then it is just a stand alone ASRC. So many parts of the 1896 datasheet appear to be copied into this datasheet which makes sense. The best I could figure is that since this SRC is part of a larger system in this part that there must be a constraint on the output rate that the rest of the system has to contend with. Note that the output of the SRC can only go to internal destinations so I am fairly certain this is the reason for the constraint.
      
 
      I hope this helps,
      
 
      Dave T
      
 

       
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

      •