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ADA4817-1 Production
The ADA4817-1 (single) and ADA4817-2 (dual) FastFETâ„¢ amplifiers are unity-gain stable, ultrahigh speed, voltage feedback amplifiers with FET inputs....
Datasheet
ADA4817-1 on Analog.com

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ADA4817-1　Power Down

    
		

			

									
					    Yuya
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 22, 2018 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Hi,
    

    My customers are considering ADA 4817-1.
    

    So I got a question.
    It is about operation in the Power Down state.
    

    #1  Is the input pin High-Z (high impedance)?
    

    #2  Does the current leak from the input pin?
    

    

    Best regards
    

    Yuya
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Operational Amplifiers (Op Amps)
                
                                                    
                 amplifiers
                
                                                    
                 Low Input Bias Current Op Amps (≤100 pA)
                
                                                    
                 ada4817-1
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Oct 23, 2018 9:40 PM
            

            
					
      
	
      

		
		
      
					
      Hi Yuya,
      

      During power down state,
      

      The leakage current at the power down pin is indicated in the ADA4817-1's datasheet.
      Typically 34uA at ±5V operation.
      and typically 31uA at 5V operation.
       
      But if you're referring to the amplifier's input (+IN and -IN), It's always in High-Z and the Input bias current are still present and specified on the datasheet.
      Typically 75pA at ±5V operation.
      and typically 50pA at 5V operation.
      

      Best Regards,
      Dann
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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