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AD1856N-K vs AD1851N-J



		

			

									
					    DIY DAC Man
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 1, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I'm working with a DIY design involving AD1856N-K DACs with analogue supply voltages set at +/- 12V
    

    I have now learned that AD1851N-J exists (perhaps I may need to order new old stock). I realise that I will need to reduce the supply voltage to +/- 5V
    

    My question is which of these DAC arrangements  will yield better (more hifi) performance? I find the datasheet statistics a little confusing and contradictory, including Analog's data lookup table.
    

    Can somebody please walk me through understanding which DAC is better in terms of 'sound quality'?
    

    Thank you
    

    Matthew
    

    

    

    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on May 8, 2019 3:20 PM
            
            
					
      
	
      

		
		
      
					
      Hi Matthew,
      

      

      It looks like you've run into a problem where we have two different generations of datasheets for these two parts, making direct comparison difficult! Based on the available information about these two parts, the AD1856 appears to perform better at higher volumes (with a THD+N figure about 3-6dB better than the AD1851). At lower volumes (-60dB input), however, the roles reverse, and the AD1851 performs about 6dB better.
      

      

      So, as far as which one provides a more "hifi" sound? They're pretty close, so it would really come down to personal taste. The two parts are pin-compatible, so I would recommend sampling both, and seeing which sound fits your application better in the same system, then going from there.
      

      

      Best regards,
      

      Tyler
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on May 20, 2019 10:09 PM
            
            
												
						in reply to ADIApproved
					
									
        
	
        

		
		
        
					
        Thanks for the reply TylerK. From looking at the specs I would agree with your interpretation. It now seems that my only choice is the AD1856 - this is for reasons of thermal management in my supply circuit. Good to have your opinion however.
        

        Cheers
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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