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AD9957 spurious output



		

			

									
					    ctonin
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 15, 2021 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    

    we are using AD9957 in QDUC at 350 MHz and we have sample rate harmonic spurs on output, with a PDCLK 96 MHz rate
    

    for a 96 MHZ sample rate.
    

     
    

    In the plot in the AD9957 datasheet I don't see this kind of spurs, could you suggest us something to limit the problem?
    

    

    Many thanks and best regards
    

    

    Claudio