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AD6655 Production
The AD6655 is a mixed-signal intermediate frequency (IF) receiver consisting of dual 14-bit, 80 MSPS/105 MSPS/125 MSPS/150 MSPS ADCs and a wideband digital...
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AD6655 on Analog.com

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Unable to configure AD6655



		

			

									
					    ishansahu
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 22, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am working on AD6655 adc. i was able to cofigure it properly but from last 1 week i am struggling with it. I am using channel A, i can see Clock is comming at CLK pins(49,50) but DCOA is having lots of noise and drift.Previously, I was able to get DCOA without programing the device, but not now.
    
 
    Thanks in advnce??
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Jan 23, 2014 1:55 AM
            
            
					
      
	
      

		
		
      
					
      Hi,
      
 
      I have a couple of questions for you to help troubleshoot your issue.
      
 
      Are you using the AD6655 evaluation board and EVALCZ data capture board?
      
 
      Or are you using your own system board?
      
 
      What is your clock amplitude at pins 49, 50?
      
 
      What do the data outputs look like?  Are you getting output data from them?
      
 
      Regards,
      
 
      Jonathan
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Jan 29, 2014 4:41 PM
            
            
					
        
	
        

		
		
        
					
        hi Jonathan,
        
 
        i m using my own board, I am getting 2Vpp on both 49,50 pins.
        
 
        data pins have random outputs.
        
 
        regards
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        
            
			                            
                        
                on Jan 30, 2014 2:34 AM
            
            
					
        
	
        

		
		
        
					
        Hi,
        
 
        Can you please send a list of the SPI writes you are using to configure the AD6655?  Also, please verify that when you write to configure the device that the settings are being written properly (i.e. read back to verify that the settings are what you expect).
        
 
        Regards,
        
 
        Jonathan
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
				
						
				
				
		
		
        
			
		
        
	
        

        

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