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ADCMP354 truth table



		

			

									
						tmineno
					
							

			
				
									
											
			
			
				
  •    

			
			
			    	
			                    
                
				                on Sep 18, 2014 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hello All,

 
This is a elementary question but confusing one.

 
According to Figure 21(I attached below) in the ADCMP354 datasheet(Rev B), I think at fist comparator connect to n-FET and its drain connect to the output-pin, then if the output of comparator is low, the output of ADCMP354 is high.

 

 
However ADCMP354 is active high and non-inverting comparator and if the input is lower than 0.6, the output should be low.

 
I think Figure 21 is not exactly but I'd like to confirm the truth table of ADCMP354 and ADCMP350.

 

  

   
    

     device
     input
     output
    

   
   
    

     ADCMP350
     >0.6
     low
    

    

     
     <0.6
     high
    

    

     ADCMP354
     >0.6
     high
    

    

     
     <0.6
     low
    

   
  

 

 
Is it correct?

 
Regards,

 
Taiki

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	

		
	

















	

	

					



			








	
	
	
	



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													0
							
			
				
									
							        
			
			
			
    •    
    
            
			                            
                        
                on Sep 19, 2014 12:31 PM
            
            
					
    
	
    

		
		
    
					
    Hi Taiki,
    
 
    Thanks for pointing this out. I think there is an error on the diagram. You have the correct truth table which is the output goes to high impedance if the input is above 0.6 V and will have 0 V output if the input is below 0.6 V. I will notify the product owner of this part to make a necessary action regarding this. 
    
 
    Thanks and best regards,
    
 
    Emman
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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													0
							
			
				
									
							        
			
			
			
    •    
    
            
			                            
                        
                on Sep 19, 2014 12:31 PM
            
            
					
    
	
    

		
		
    
					
    Hi Taiki,
    
 
    Thanks for pointing this out. I think there is an error on the diagram. You have the correct truth table which is the output goes to high impedance if the input is above 0.6 V and will have 0 V output if the input is below 0.6 V. I will notify the product owner of this part to make a necessary action regarding this. 
    
 
    Thanks and best regards,
    
 
    Emman
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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