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ADF4158 MUXOUT



		

			

									
						sss@jpn
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Jun 24, 2020 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hi all,


It seems that two types of DIVIDER output can be selected for the MUXOUT of the ADF4158.


R or N-DIVIDER OUTPUT, R or N DIVIDER/2
R-DIVIDER OUTPUT
N-DIVIDER OUTPUT
R-DIVIDER/2
N-DIVIDER/2


question 1
Is the understanding of the following signals correct?
Is duty cycle double ? or half ?
(R-DIVIDER OUTPUT)/2 = R-DIVIDER/2 ?
(N-DIVIDER OUTPUT)/2 = N-DIVIDER/2 ?


Question 2
R-DIVIDER OUTPUT and N-DIVIDER OUTPUT can be confirmed with other PLL products, but I have never seen R-DIVIDER/2 or N-DIVIDER/2. ‥
What is it used for?


Best regards,
sss

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



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                                 Analog Employees 
                                
                            
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                on Jul 14, 2020 10:20 AM
            
            
					
    
	
    

		
		
    
					
    Hi, a few other devices have N/2 or R/2 available at muxout. ADF41513 is another example I can think of the top of my head. Another example is the ADF4007 only has the option for R divider / 2 to muxout. 
    

    As an example, if the RFIN frequency = 6GHz, PFD = 100MHz, N = 60 then N counter will output 100MHz at muxout. This would then be 50MHz when N counter / 2 to muxout is selected.

    

    Regards,
    

    Alex
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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													0
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Jul 14, 2020 10:20 AM
            
            
					
    
	
    

		
		
    
					
    Hi, a few other devices have N/2 or R/2 available at muxout. ADF41513 is another example I can think of the top of my head. Another example is the ADF4007 only has the option for R divider / 2 to muxout. 
    

    As an example, if the RFIN frequency = 6GHz, PFD = 100MHz, N = 60 then N counter will output 100MHz at muxout. This would then be 50MHz when N counter / 2 to muxout is selected.

    

    Regards,
    

    Alex
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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