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AD9959 Recommended for New Designs
The AD9959 consists of four direct digital synthesizer (DDS) cores that provide independent frequency, phase, and amplitude control on each channel. This...
Datasheet
AD9959 on Analog.com

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How can I  output 4  sinewaves with defferent Amplitude from AD9959 in single-tone-mode?



		

			

									
					    XINs
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 10, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I read the datasheet,and know AD9959 can control independent frequency/phase/amplitude  between channels. But I'm confused with that how  I can change the amplitude of sinewave in signgle-tone-mode. Dose RU/RD work? I want that the amplitude of sinewaves from 4 channels can be comtrol and don't be changed later.    
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Apr 12, 2022 2:08 PM
            
            
					
      
	
      

		
		
      
					
      Static amplitude control can be applied on a per-channel basis as follows...
      

        

      1. Select the desired channel per register CSR[7:4].
        2. 

      2. Enable amplitude control by programming register ACR[12]=1 (applies only to the selected channel).
        3. 

      3. Disable RU/RD by programming register ACR[11]=0 (applies only to the selected channel).
        4. 

      4. Program the desired amplitude via register ACR[9:0] (applies only to the selected channel).
        5. 

      5. Repeat steps 1 through 4 for each channel.
        6. 

      

      Note that you can program the amplitude for multiple channels simultaneously by setting multiple bits in step 1. However, this is only useful if more than one channel uses the same amplitude value.
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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