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ADF4350 Production
The ADF4350 allows implementation of fractional-N or integer-N phase-locked loop (PLL) frequency synthesizers if used with an external loop filter and...
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ADF4350 on Analog.com

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Switch between two TCXOs to feeding ADF4350

		
	
				

			

									
					    lotus
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Dec 1, 2011 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user needs to design a circuit to switch between two TCXOs for an ADF4350 synthesizer. Analog Devices recommends the ADG619/719/749/779 for single-ended signals and the ADG636/736/787/772 for differential signals. For the specific application of switching between a 26 MHz and a 10 MHz reference clock, the ADG849 or ADG852 is suggested due to their low ON resistance and sufficient bandwidth. The ADG852 has a bandwidth of 100 MHz and an ON resistance of 1.5 Ohms, making it suitable for the application, though jitter performance is not explicitly tested or provided.
                        	    
    
                
                     AI Generated Content
                
    	    
    
             
				
        		
    
		    
		    		    
		    			
    
			    
    Dear Sir/Madam:
    
 
    I need to design ADF4350 synthesizer that can use either one of two TCXOs.  Do you have any switch that can do this job?
    
 
    The connection is as follows:
    
 
                      _______
    
 
    TCXO1 ----->|Switch |--------->ADF4350
    
 
    TCXO2 ----->|______|
    
 
    Thank you
    
			
    
			
									
		                             
                        

    
    
                                            
                 Integer-N PLL
                
                                                    
                 rf & microwave
                
                                                    
                 adf4350
                
                                                    
                 Phase Locked Loop (PLL) Synthesizer & Translation Loop
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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