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HMC1061LC5



		

			

									
					    Ning
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 8, 2015 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    
 
      
  
    1. Is the absolute maximum input for INP still +10dBm if the input is driven single-endedly with INN terminated in 50 ohms?
      2. 
  
    2. is the sampling transfer function in the datasheet a plot of the peak amplitude at the output vs the input frequency? with THA+ADC setup, the 3dB bandwidth of the frequency response from ADC was only abt 8GHz. Across the 18GHz, the gain dropped about 5.5dB. what could be the cause?
      3. 
 
    
 
    Thank you.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on May 14, 2015 2:45 AM
            
            
					
      
	
      

		
		
      
					
      1. A lower input amplitude than the specified full-scale will directly subtract from the system SNR. On the other hand, the SFDR with respect to the carrier will improve a little as the carrier power is reduced a little from the full-scale. As the carrier power is further reduced, the SFDR may not improve much more.
      
 
      2. Yes. The effect is less than what's seen with single-ended signal input, but there is some degradation.
      
 
      3. A wideband balun is the best way to do this unless DC operation is required. In that case, a wideband diff. amp may be used. ADL5566 is one such device you may consider. Its -3dB bandwidth is 4.5GHz. Marki Microwave or Mini-Circuits baluns have worked well for us.
      
 
      4. We have not characterized the single-ended operation.
      
 
      In fact, for all the above issues, I would recommend thoroughly evaluating the HMC1061 using its eval board in conjunction with the ADC of your choice.
      
 
      Regards.
      
 
      Robbie
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on May 14, 2015 2:45 AM
            
            
					
      
	
      

		
		
      
					
      1. A lower input amplitude than the specified full-scale will directly subtract from the system SNR. On the other hand, the SFDR with respect to the carrier will improve a little as the carrier power is reduced a little from the full-scale. As the carrier power is further reduced, the SFDR may not improve much more.
      
 
      2. Yes. The effect is less than what's seen with single-ended signal input, but there is some degradation.
      
 
      3. A wideband balun is the best way to do this unless DC operation is required. In that case, a wideband diff. amp may be used. ADL5566 is one such device you may consider. Its -3dB bandwidth is 4.5GHz. Marki Microwave or Mini-Circuits baluns have worked well for us.
      
 
      4. We have not characterized the single-ended operation.
      
 
      In fact, for all the above issues, I would recommend thoroughly evaluating the HMC1061 using its eval board in conjunction with the ADC of your choice.
      
 
      Regards.
      
 
      Robbie
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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