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AD9083 Recommended for New Designs
The AD9083 is a 16-channel, 125 MHz bandwidth, continuous time S-? (CTSD) ADC. The device features an on-chip, programmable, single-pole antialiasing filter...
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AD9083 on Analog.com

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Using 16-Channel AD9083 for 8 Independent 250MSPS, 14-Bit ADC Channels



		

			

									
					    taquocviet811
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jul 23, 2024 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Datasheet/Specs
    
    		        		            		    
    Product Number:  AD9083  
    
    		        		    		    	
			
    

    Hello,
    

    

    I'm designing a system that requires 8 independent analog-to-digital converter (ADC) channels with a minimum sample rate of 250 MSPS and a resolution of at least 14 bits. 
    

    

    I came across the AD9083, which appears to be a cost-effective solution compared to other ADCs with similar specifications.
    

    

    My question is: Can I use a single 16-channel AD9083 to achieve this 8-channel, 250 MSPS, 14-bit configuration?
    

    

    The main reason I'm considering the AD9083 is because:
    

    

    It's significantly cheaper than using four separate AD9250-250 ADCs.
    

    

    However, before I solidify my decision, I'd like to understand if there might be any drawbacks to using the AD9083 compared to using four AD9250-250s.
    

    

    Any insights or advice from the community would be greatly appreciated!
    

    

    Thanks,
    

    

    

    

    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Datasheet/Specs
                
                                                    
                 High Speed A/D Converters >10 MSPS
                
                                                    
                 Standard High Speed A/D Converters
                
                                                    
                 AD9083
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
					
      
	
      

		
		
      
					
      Hi  
      

      Thanks for your interest in AD9083.
      

      Your query is acknowledged. Kindly give time for the product owner () to look into this and provide their response.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                                                                                                                        
            
				
			
            
												
						in reply to JAlipio
					
									
      
	
      

		
		
      
					
      Hi  ,
      

      Thank you for reaching out.
      

      May I know your target input bandwidth?
      

      As per datasheet of AD9083, the usable analog input bandwidth is just 125MHz, if your application does not need greater than this then this part is a good choice. AD9083 is a 16 channel ADC, you can utilize all the channel or as you said you only need 8 of it then you can do so.
      

      You can go over with the datasheet of both and feel free to reach out if you need clarification regarding both ADC.
      

        
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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						in reply to jmoreno5
					
									
        
	
        

		
		
        
					
        

        Hi  
        

        Thank for the info
        

        

        Yes, my target input is only 125MHz
        

        

        I have follow-up questions that need you to confirm:
        

        

        1. Sampling Mode
        

        

        Is the AD9083 capable of simultaneous sampling across all channels, or does it perform sequential sampling?
        

        

        2. Data Rate and JESD Interface
        

        

        The AD9083 supports a sample rate of up to 2 GSPS. Can I achieve a data stream of 2 GSPS for one channel through the JESD interface, or is the maximum data rate limited to 250 MSPS for one channel?
        

        

        3. Channel Reduction and Serdes
        

        

        Since I only require 8 channels, is it feasible to utilize a Xilinx 4GTX transceiver with a maximum line rate of 12.5 GSPS per lane instead of 16 GSPS for 16 channels?
        

        

        

        

        

        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													+1
							
			
				
									
							        
			
			
			
        •  Analog Employees  
        
            
			                            
                                                                                                                        
            
				
			
            
												
						in reply to taquocviet811
					
									
        
	
        

		
		
        
					
        Hi  ,
        

        Here's the answer for your question:
        

        1. Sampling Mode
        

        AD9083 has 16 ADC core. Each ADC has a signal processing tile to filter out of band noise and reduce sampling rate for simultaneous sampling across all channel.
        

        2. Data Rate and JESD Interface
        

        The maximum output data rate is 250MSPS/channel using 8channel. Using below setting:
        

        #Channel =8; L=4; M=8; F=4; S=1; N=16; K=32 with CIC = 8 and J dec = 1
        

        you'll have: (see Table24 of the datasheet)
        

        Fout = 250MHz ; Output Bandwidth = 125MHz
        

        Lane rate = 10Gbps
        

        3. Channel Reduction and Serdes
        

        I think it is feasible. The calculation above shows the lane rate of less than 12.5Gbps. The 16Gbps is the maximum lane rate allowed by the AD9083, Table24 of the datasheet can help you configure your JESD output.
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
						
						
				
				
		
		
        
			
		
        
	
        

        

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