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AD9467 Recommended for New Designs
The AD9467 is a 16-bit, monolithic, IF sampling analog-to-digital converter (ADC). It is optimized for high performance over wide bandwidths and ease of...
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AD9467 on Analog.com

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Reading data from AD9467 FMC board with ZedBoard

    
		

			

									
					    MehmetD
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 17, 2023 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  AD9467-FMC-250EBZ(EVAL-AD9467) and ZedBoard 
    
    		        		        		        
    Software Version: Vivado 2018.3
    
    		    		    	
			
    Hi!
    

    I want to read ADC data from AD9467 evaluation board with an FPGA. The board is connected ZedBoard with FMC connector and I am just using FPGA (PL)  part in ZedBoard(not PS part).
    

     connection AD9467 Eval board and ZedBoard
    

    I am sampling data with Data Clock Output(DCO) that is one of the output of AD9467 chip. Also this clock runs 250 MHz and both edges(rising and falling) are using. The timing diagram from AD9467 datasheet is below.
    

    data capture timing diagram
    

    Board clock  is coming from output(default) with sine wave type input but also we can use other option like on board oscillator or on board clock generator IC but for now it is set default(https://wiki.analog.com/resources/fpga/xilinx/fmc/ad9467#clock_selection). When I am not connect any sinus signal the clock that runs ad9467 chip must not work but it seems still working. For reading adc data  I am debugging FPGA with ILA in Vivado. When I program the FPGA ILA shows up(if there is no clock I guess ILA must not pop up) and showing some data. How that happens? 
    

    

    ila
    

    

    Thanks for your helps.
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 vivado 2018.3
                
                                                    
                 hardware
                
                                                    
                 ad9467
                
                                                    
                 High Speed A/D Converters >10 MSPS
                
                                                    
                 Standard High Speed A/D Converters
                
                                        
                                            
                
                
                                
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													0
							
			
				
									
							        
			
			
			
        
            
						
                            
            
            				
            
                on Oct 17, 2023 7:28 AM
            

            
					
        
	
        

		
		
        
					
        Update V1.1
        

        I changed clock path to the oscillator on the board. I removed C202 and add C205, C206(100nF) acording to the link(https://wiki.analog.com/resources/fpga/xilinx/fmc/ad9467#clock_selection). After this when I give an analog input to the board or when I do not I see always around  value of 32700 in ILA(same again). In datasheet this is approximately 0 V. I did not changed anything adc configuration with SPI, I leaved out everything in default mode.
        

        output coding
        

        After that I monitor clock(CLK) that feed ad9467 and data clock output(DCO) that output pin for capture data. Both of clock is must be 250 MHz however oscilloscope says that 25 MHz. Frequency must be 250 MHz acording to the documents on the internet. Also says that oscillator is in 250 MHz (VCC6-QCD-250M000) but in my board this oscillator is 25MHz(VCC6-QCD-25M000). Because of that *** frequency is 25 MHz but is must be 250 MHz. How it can be happened, or did I miss something?
        

         This is ADC clock input                                                                           
        

        clk_in 
        

          This is ADC DCO output
        

          clk_dco_out
        

        After all this how can I read data from ad9467 evaluation board with ZedBoard(only using FPGA, PL part)?
        

        I can open any idea, website links, example projects, articles...? I am already appretiate it for your replies?
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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Reply

        


      • 
	
        



	
		
	
	



        
	
        
		
        
							
					
        
		
        
			
													0
							
			
				
									
							        
			
			
			
          
            
						
                            
            
            				
            
                on Oct 17, 2023 7:28 AM
            

            
					
          
	
          

		
		
          
					
          Update V1.1
          

          I changed clock path to the oscillator on the board. I removed C202 and add C205, C206(100nF) acording to the link(https://wiki.analog.com/resources/fpga/xilinx/fmc/ad9467#clock_selection). After this when I give an analog input to the board or when I do not I see always around  value of 32700 in ILA(same again). In datasheet this is approximately 0 V. I did not changed anything adc configuration with SPI, I leaved out everything in default mode.
          

          output coding
          

          After that I monitor clock(CLK) that feed ad9467 and data clock output(DCO) that output pin for capture data. Both of clock is must be 250 MHz however oscilloscope says that 25 MHz. Frequency must be 250 MHz acording to the documents on the internet. Also says that oscillator is in 250 MHz (VCC6-QCD-250M000) but in my board this oscillator is 25MHz(VCC6-QCD-25M000). Because of that *** frequency is 25 MHz but is must be 250 MHz. How it can be happened, or did I miss something?
          

           This is ADC clock input                                                                           
          

          clk_in 
          

            This is ADC DCO output
          

            clk_dco_out
          

          After all this how can I read data from ad9467 evaluation board with ZedBoard(only using FPGA, PL part)?
          

          I can open any idea, website links, example projects, articles...? I am already appretiate it for your replies?
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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