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AD9102 Production
The AD9102 TxDAC and waveform generator is a high performance digital-to-analog converter (DAC) integrating on-chip pattern memory for complex waveform...
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AD9102 on Analog.com

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AD9102 Output Signal

		
	
				

			

									
					    Valemea
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 15, 2013 
				
			
			
		
    
		
		                    	    
    
        	    
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                The user is unable to generate a signal using the AD9102 despite writing and reading all registers. The solution involves setting the DDS Tuning Word source to RAM data and using the DDS MSB as the SRAM address counter clock. Additionally, the user must ensure the RAMUPDATE register is set to 1 to transfer shadow register values to active registers. The data sheet lacks clear examples and specific details, leading to confusion about the initialization sequence and register settings.
                        	    
    
                
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    I’m using  AD9102, I write and read in all register but I haven't output signal.
    
 
    What is the minimum registers configuration for generate a signal?
    
 
    Can it work without calibration?
    
 
    In attachment the schematic.
    
 
    Regards.
    
 
    Valentino
    
			
    
			
									
		                             
                        

    
    
                                            
                 ad9102
                
                                                    
                 clock and timing
                
                                                    
                 Clocks & Timers
                
                                                    
                 Direct Digital Synthesis (DDS)
                
                                
            
    
    
    
		
    

				
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                on Nov 7, 2013 9:12 PM
            
            
						
			            		
        
		
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        Hello Larry,
        
 
        Thanks for getting back to me so fast. 
        
 
        The simplest waveform I want to generate is a swept square wave. 
        
 
        So Ram [0] = 0x7FFF  (-ve min)
        
 
              Ram [1] = 0x8000  (+ve max)
        
 
        Start = 0, Stop =1, Pattern length = 2
        
 
        Output directly from Ram, continuous pattern, Address counter incremented by DDS_MSB
        
 
        Set DDS frequency to any value (I used 1000 Hz). 
        
 
        I expect  a Square Wave of 500 Hz. 
        
 
        If this can be done, I'll be grateful!
        
 
        regards
        
 
        Bart
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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                on Nov 7, 2013 9:12 PM
            
            
						
			            		
          
		
										0
					
	
          

		
		
          
		
          
                                
                                                            
          
					
          Hello Larry,
          
 
          Thanks for getting back to me so fast. 
          
 
          The simplest waveform I want to generate is a swept square wave. 
          
 
          So Ram [0] = 0x7FFF  (-ve min)
          
 
                Ram [1] = 0x8000  (+ve max)
          
 
          Start = 0, Stop =1, Pattern length = 2
          
 
          Output directly from Ram, continuous pattern, Address counter incremented by DDS_MSB
          
 
          Set DDS frequency to any value (I used 1000 Hz). 
          
 
          I expect  a Square Wave of 500 Hz. 
          
 
          If this can be done, I'll be grateful!
          
 
          regards
          
 
          Bart
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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