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ADRF6720-27 Obsolete
The ADRF6720-27 is a wideband quadrature modulator with an integrated synthesizer ideally suited for 3G and 4G communication systems. The ADRF6720-27 consists...
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ADRF6720-27 on Analog.com

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ADRF6720-27 evaluation board output power



		

			

									
					    sergey.tikhonov
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 16, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    

    we plan to use ADRF6720-27 in our project,
    

    but we can't achieve output power which mentioned in datasheet at the evaluation board output. 
    

    for example for output freq. 1.9GHz (2.7V input bias, 0.5Vpp at each of 4 BB inputs) output power is only 3.3dBm and according to datasheet it should be 4.5dBm. 
    

    Should we consider this 1.2 dB as a losses of the eval board?
    

    

    Thanks,
    

    Sergey
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on May 31, 2019 5:00 PM
            
            
					
      
	
      

		
		
      
					
      Hi Sergey,
      

      

      Sorry for late.
      

      I don't have the trace loss data on evaluation board but it would not be that much. I may be around 0.5dB at that frequency(1.9GHz). Some portion of output power difference can be from part-part variation as you can see it on Figure 4. It is about 0.4dB (4.2~4.6dBm @ 1.9GHz, 25C). And make sure input voltage is 1Vp_p differential at the pins on DUT and assuming the cable loss is calibrated out. It is not exact trace loss information but I wish it helps you.
      

      Regards
      

      Tony 
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Jun 1, 2019 6:45 AM
            
            
												
						in reply to THA
					
									
        
	
        

		
		
        
					
        Hi Tony, 
        

        Thank you! The cable losses were calibrated but if we take into account 0.5dB of RF trace losses, unit to unit variation and chip temperature (it was around 50C on the chip package) then 3.3dBm looks good.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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