Products Mentioned

ad9652 Recommended for New Designs
The AD9652 is a dual, 16-bit analog-to-digital converter (ADC) with sampling speeds of up to 310 MSPS. It is designed to support demanding, high speed...
Datasheet
ad9652 on Analog.com

Thread Details

  • State Not Answered
  • Replies 1 reply
  • Subscribers 45 subscribers
  • Views 331 views
  • Users 0 members are here
Options 

        

            Post
             Go back to editing
        

    

    


    

    









		


















	
	
			
	
			
		
	
	
		

	    
	    
	    		
AD9652 - VREF

		
	
				

			

									
					    seung-gon
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 23, 2021 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hi,
    

    

    I want to adjust the voltage of VREF using an external reference.
    

    I couldn't find the specification for VREF in the datasheet.
    

    What is the minimum voltage that can be applied to that external reference (VREF pin) ?
    

    

    Thanks.
    

    
			
    
			
									
		                             
                        

    
    
                                            
                 High Speed A/D Converters >10 MSPS
                
                                                    
                 Standard High Speed A/D Converters
                
                                                    
                 ad9652
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
		
	
	



      
	
      
		
      
							FormerMember
					
      
		
      
		    
		    		    
			
				
									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Mar 23, 2021 11:04 AM
            
            
						
			            		
    
		
										0
					
	
    

		
		
    
		
    
                                
                                                            
    
					
    Hello,
    

    The description of the Internal reference suggests that the VREF pin voltage can be varied between 1.0 and 1.25 V via SPI. 
    This range should also apply when the internal voltage is disabled and replaced with an external voltage.  So using an external voltage reference of 1.0 V should result in 2.0 V pp which is the lowest full-scale supported.  
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    


	


    

	
			
    

    





		
    
		
    
			
      
				
    • 
					
												
						
						
						
						
						
						
						

																										
						
						

					
					
					
				
      •