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AD9830 range of REFIN voltage from outside source



		

			

									
					    Titan123
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Jan 29, 2019 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi, 

    REFIN of AD9830 can come from external source (see description of REFIN on page 5 on datasheet in link). Nominal value is 1.21V. I am trying to find what are minimum and maximum values that can safely be applied to REFIN. In specifications on page 2, it is given that REFIN input impedance is 10Mohm. 


    www.analog.com/.../ad9830.pdf


    Thanks.