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ADA4092-4 differential input voltage



		

			

									
					    Terumasa
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 12, 2014 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hello 
    
 

    Please let me know about overvoltage protection (OVP) of ADA4092-4.
    
 
    Datasheet P. 6 tabel5 absolute maximum rating says below.
    Input Voltage: Refer to the Input Overvoltage Protection section
    Differential Input Voltage: ±VSY
    
 
    What is the difference between input voltage and differential input voltage ?
    Our customer asks if above means that OVP does not work when differential signal input is used,
    because customer uses ADA4092-4 in below condition.
    
 
    Operated condition
    5V single supply
    Input signa: 2.5V +-2.5V differential input
    
 
    (-10~+10V overvoltage protection is needed )
    
 
    Regards,
    Terumasa
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
        
            
			                            
                        
                on Sep 18, 2014 8:20 AM
            
            
					
        
	
        

		
		
        
					
        Hello Emman
        
 
        Thank you for your advice.
        
 
        Please let me confirm if my understanding is correct.
        
 
        For example, ADA4092-4 is used at below overvoltage input condition in attached voltage folower.
        
 
        Input: Overvoltage +15V
        
 
        Supply: SIngle 5V supply
        
 
        In this case, differential input voltage is +Vin -  -Vin = 15V -5V =10V.
        
 
        10V is above limitation of absolute maximum rate of differential input voltage  ( within +-Vsupply = 0~5V).
        
 
        So, Overvoltage above supply rail can not be protected in this case ?
        
 
        Is it correct ?
        
 
        Please let me know your advice
        
 
        Regards,
        
 
        Terumasa
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Sep 18, 2014 8:20 AM
            
            
					
          
	
          

		
		
          
					
          Hello Emman
          
 
          Thank you for your advice.
          
 
          Please let me confirm if my understanding is correct.
          
 
          For example, ADA4092-4 is used at below overvoltage input condition in attached voltage folower.
          
 
          Input: Overvoltage +15V
          
 
          Supply: SIngle 5V supply
          
 
          In this case, differential input voltage is +Vin -  -Vin = 15V -5V =10V.
          
 
          10V is above limitation of absolute maximum rate of differential input voltage  ( within +-Vsupply = 0~5V).
          
 
          So, Overvoltage above supply rail can not be protected in this case ?
          
 
          Is it correct ?
          
 
          Please let me know your advice
          
 
          Regards,
          
 
          Terumasa
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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