Products Mentioned

AD9514 Recommended for New Designs
The AD9514 features a multi-output clock distribution IC in a design that emphasizes low jitter and phase noise to maximize data converter performance...
Datasheet
AD9514 on Analog.com

Thread Details

  • State Not Answered
  • Replies 1 reply
  • Subscribers 139 subscribers
  • Views 165 views
  • Users 0 members are here
Options 

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
AD9514 configuration

		
	
				

			

									
					    AS709
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 5, 2024 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  AD9514  
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hi,
    

    I would like to us the AD9514 component in my design 
    

    configuration is as below:
    

    1. CLOCK input = 1GHz
    

    2. LVDS output - 125MHz
    

    3. LVPECL output - 250MHz
    

    

    questions:
    

    1. what is the best way to convert the LVPECL output to single-ended? what is the expected power level?
    

    2. what shall I connect to the unused LVPECL output?
    

    3. What is the expected current supply in this configuration?
    

    

    Thanks,
    

    Asaf
    
			
    
			
									
		                             
                        

    
    
                                            
                 Datasheet/Specs
                
                                                    
                 Clock Generation and Distribution
                
                                                    
                 Clock Distribution Devices
                
                                                    
                 ad9514
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
		
	
	



      
	
      
		
      
							
					
      
		
      
		    
		    		    
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Aug 6, 2024 4:13 AM
            
            
						
			            		
      
		
										0
					
	
      

		
		
      
		
      
                                
                                                            
      
					
      Hi Asaf,
      

      To answer your questions:
      1. The expected output differential voltage of the AD9514 are 640mV, 790mV and 960mV. That is around 8.2mW, 12mW and 18mW, respectively. Using only one side of the differential pair would half the voltage, thus would quarter the power.
      2. You can still use the recommended output termination for LVPECL for unused outputs. The simplest one is to just connect a 200 ohms resistor to ground.
      3. I think there isn't much change in the current supply for this configuration. I'd recommend setting other outputs to OFF (Table 11 of the data sheet) to achieve power savings (Table 7).
      

      Best regards,
      Mark
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

      •