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The AD9106 TxDAC® and waveform generator is a high performance, quad digital-to-analog converter (DAC) integrating on-chip pattern memory for complex waveform...
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AD9106 on Analog.com

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AD9106  gain setting question?



		

			

									
					    Jambo
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 29, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    How do you setting the DACX Digital Gain register(0x35) ?
    

     
    

    Does the 7 bits maps to gain of +/-1 or +/-2 or others ?
    

     
    

    Follow the calculation:
    

     
    

     
    

    IOUTP1 = 32 X V_REFIO / xRSET=32x (1.04/8.06k) =4.129mA (Max 4mA)*249Ohm = 996mV ,the actual amount to voltage only 700mV.
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Sep 3, 2020 4:13 AM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      The 12-bit DACx_DGAIN maps to +/-2. This applies to all four DAC channels.
      

      The voltage computation looks good. Are you able to confirm the actual voltage at the REFIO pin to be 1.04V? Also, make sure that you're sending full-scale code to the DAC to measure full-scale voltage, and disable the DACx_RSET_EN bits since you're using external resistors.
      

      Regards,
      

      Mark
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
			                            
                        
                on Sep 3, 2020 4:13 AM
            
            
					
      
	
      

		
		
      
					
      Hi,
      

      The 12-bit DACx_DGAIN maps to +/-2. This applies to all four DAC channels.
      

      The voltage computation looks good. Are you able to confirm the actual voltage at the REFIO pin to be 1.04V? Also, make sure that you're sending full-scale code to the DAC to measure full-scale voltage, and disable the DACx_RSET_EN bits since you're using external resistors.
      

      Regards,
      

      Mark
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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