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AD9106 Production
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 and white Noise



		

			

									
					    FJahn629
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 29, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi and good morning together,
    

    we evaluate the AD9106. We have the AD9106-EBZ eval board.
    

    Beside of sine waveform generation, we have to generate noise. We are using  the windows demo software
    

    If I configure to DDS, 100kHz, i get a perfect sine with an amplitude of 1Vss. After i switch to random to get white noise (PRESTORE_SEL1 to 2) i get noise, but only with an amplitude of about 40mVss. How can i get noise with an higher amplitude?
    

    

    Other question:
    

    Is the AD9106 the best choice or would you sugest an other DDS chip for the following customer requirements:
    

    Sine Wave Generation:
    - Range 15kHz to 65kHz
    - Freq resolution: <=1Hz (I think we can archive this with an 16.777216Mhz clock
    - Very low THD: at least <0,1 %
    - Very good SNR: at least 60 dB
    - 2. Second sine wave with the same parameter but with 90° phase shift.

    Noise Generation: 
    - white noise from 15kHz to 65kHz
    

    Regards
    

    Falko