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ADA4000 comparator



		

			

									
					    Jajajib
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 19, 2013 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi AD,
    
 
    is the ADA4000-1 can be used as a comparator instead of amplifier and is it a dedicated op-amp to work for this kind of use (e.g comparator)
    
 
    It seems that ADA4000 is highly sensitive working as a comparator and it doesn't like this non linear mode. 
    
 
    Moreover with a transistor on the output which could create high DV/DT for example.
    
 
    thanks for your help,
    
									
			        
		
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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      •  Analog Employees  
      
            
			                            
                        
                on Mar 11, 2013 1:17 PM
            
            
					
      
	
      

		
		
      
					
      Hello Jaja,
      
 
      We do not necessarily need the full system schematic, but merely the section with the amplifier. Without the schematic, we have no means to understand how the device is being applied and with it, the possible failure modes. One can neither diagnose a malfunctioning black box, nor declare with certainty the root cause if the box cannot be opened or investigated. 
      
 
      Poor supply decoupling will generally not be a problem as that is a function of PSRR. 
      
 
      Asymmetric supplies are not a problem, so long as their values do not exceed the absolute max ratings of the part. ESD is a possibility, but again no information is provided about the failure mode to believe it to be ESD with any certainty. 
      
 
      Cheers,
      
 
      -David
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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      •  Analog Employees  
      
            
			                            
                        
                on Mar 11, 2013 1:17 PM
            
            
					
      
	
      

		
		
      
					
      Hello Jaja,
      
 
      We do not necessarily need the full system schematic, but merely the section with the amplifier. Without the schematic, we have no means to understand how the device is being applied and with it, the possible failure modes. One can neither diagnose a malfunctioning black box, nor declare with certainty the root cause if the box cannot be opened or investigated. 
      
 
      Poor supply decoupling will generally not be a problem as that is a function of PSRR. 
      
 
      Asymmetric supplies are not a problem, so long as their values do not exceed the absolute max ratings of the part. ESD is a possibility, but again no information is provided about the failure mode to believe it to be ESD with any certainty. 
      
 
      Cheers,
      
 
      -David
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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