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ADRF6520 Recommended for New Designs
The ADRF6520 is a matched pair of fully differential low noise and low distortion programmable filters and variable gain amplifiers (VGAs). Each channel...
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ADRF6520 on Analog.com

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ADRF6520 in/out system connection



		

			

									
					    Waiting.L
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 14, 2021 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I'm confusing about this part's output network description in user guide.
    

    There are 2 channels (OPP1/OPM1) (OPP2/OPM2) with 20ohm differential impedance.
    

    How could I connect to next stage by 100ohm diff pairs from output pin? 
    

    Btw, is it necessary connect input to previous stage by 100ohm diff pairs directly w/o T1/T2 balun?
    

    

    Thanks.
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Jul 20, 2021 12:21 PM
            
            
					
      
	
      

		
		
      
					
      Each output has an output impedance of 20 Ohms differential and is loaded with 100 Ohm differential.  If the differential pair present a 100 Ohm differential impedance, you should be able to connect directly. 
      

      No, you do not need to use the baluns that are on the evaluation board.  Those are mainly there to interface easily with test equipment. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Jul 20, 2021 12:21 PM
            
            
					
      
	
      

		
		
      
					
      Each output has an output impedance of 20 Ohms differential and is loaded with 100 Ohm differential.  If the differential pair present a 100 Ohm differential impedance, you should be able to connect directly. 
      

      No, you do not need to use the baluns that are on the evaluation board.  Those are mainly there to interface easily with test equipment. 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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