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ADF4159 Recommended for New Designs
The ADF4159 is a 13 GHz, fractional-N frequency synthesizer with modulation and both fast and slow waveform generation capability. The part uses a 25-bit...
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ADF4159 on Analog.com

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Individual delay when dual ramp feature enabled



		

			

									
					    geeth_anurag_uts
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jun 29, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  ADF4159 
    
    		        		    		    	
			
    Hello team,
    

    I enabled the dual ramp feature of the PLL by setting register values as per the following
    

     
    

    Observed the MUXOUT signal behavior in oscilloscope. The timing matched the above specifications.
    

    But I have a question. Is it possible or is there any way to give separate delay for two ramps when PLL is in dual ramp mode?
    

    Thanks and regards,
    

    GAR.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      •  Super User  
      
            
			                            
                        
                on Jun 30, 2022 8:49 PM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      Sorry the ADF4159 does not support multiple delay timings. The ADF5902 does support this, but it contains the ADF5901 VCO and Tx chip specific for the 24GHz ISM band so may not be applicable for your use case.
      

      With ADF4159 you could use TxData to trigger your ramp steps individually. This is done by setting TxData ramp clock = 1. The ramp steps can be incremented by TxData pulses which allows more custom control over the how long each step takes. Please see figure 49 in datasheet for more info.
       
      

      Regards,
      

      Alex
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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