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AD9910 Recommended for New Designs
The AD9910 is a direct digital synthesizer (DDS) featuring an integrated 14-bit DAC and supporting sample rates up to 1 GSPS. The AD9910 employs an advanced...
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AD9910 on Analog.com

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AD9910 No Output

		
	
				

			

									
					    Sarmad
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Dec 12, 2025 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user is experiencing no output when using the EVAL-AD9910 for a frequency sweep with an external microcontroller, despite the same setup working on a third-party AD9910 board. The final answer suggests checking the resistor configuration for the filtered output and confirms that the PLL loop filter should be stuffed. The user has already verified the SPI communication and control signals, but read-back values from the AD9910 registers are incorrect, and the PLL_LOCK pin is low. Further troubleshooting includes verifying the 3.3V Vcc connection and the power sequence.
                        	    

                
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Category: Hardware

    		        		            		    
Product Number:  AD9910 

    		        		    		    

		    		    
		    			

			    
I am using EVAL-AD9910 to output a frequency sweep. I have tried programming the DDS using an external microcontroller and the ADI's GUI as well, but there is no output. The microcontroller and firmware I used has been tested earlier with a 3rd party AD9910 board, where it worked well. I have not yet stuffed the PLL Loop Filter EVAL-AD9910. Does the missing filter leads to no output?

			

			
									
		                             
                        

    

                                            
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