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AD9954 Production
The AD9954 is a direct digital synthesizer (DDS) that uses advanced technology, coupled with an internal high speed, high performance DAC to form a complete...
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AD9954 on Analog.com

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AD9954 Driving output's amplitude

		            
		

			

									
					    wivern
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 19, 2012 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    I need fine drive output amplitude at AD9954.
    
 
    My question is. Is possible use anything as http://www.analog.com/static/imported-files/circuit_notes/CN0156.pdf ?
    
 
    If  so within what limits can control the amplitude?
    
 
    http://www.google.cz/url?sa=t&rct=j&q=cn0156.pdf&source=web&cd=2&ved=0CDYQFjAB&url=http%3A%2F%2Fwww.analog.com%2Fstatic%2Fimported-files%2Fcircuit_notes%2FCN0156.pdf&ei=OK9nT_bEKoy3hAf368DBCg&usg=AFQjCNHcLCFIxfsCwuuLitDPmL8ig1Z0Ug
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 ad9954
                
                                                    
                 clock and timing
                
                                                    
                 Direct Digital Synthesis (DDS)
                
                                
            
    
    
    

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 20, 2012 5:11 PM
            
                                    
					
      
	
      

		
		
      
					
      The AD9954 is equipped with output amplidtude control. Have you considered using the internal output scalar to control output amplitude? If not, then enable the OSK enable bit in register CFR1 bit <25> and  then use the Amplitude Scale Factor register (ASF) 0x02 and you'll have 14-bits of amplitude resolution.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Aug 11, 2024 12:06 PM
            
                                    
												
						in reply to ADIApproved
					
									
        
	
        

		
		
        
					
        Hi. I know this is a very old thread but i want to use ASF for AD9954 single tone mode operation. As you mentioned I need to set OSK enable bit and write to ASF register but what should be the state of the OSK physical pin? high or low? I want to use ASF register for amplitude control of single tones generated. thanks
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Aug 11, 2024 12:06 PM
            
                                    
												
						in reply to ADIApproved
					
									
          
	
          

		
		
          
					
          Hi. I know this is a very old thread but i want to use ASF for AD9954 single tone mode operation. As you mentioned I need to set OSK enable bit and write to ASF register but what should be the state of the OSK physical pin? high or low? I want to use ASF register for amplitude control of single tones generated. thanks
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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