Products Mentioned

ADE1202 Recommended for New Designs
The ADE12021 is a dual channel, configurable, isolated digital input monitoring solution for energy transmission and distribution applications. The ADE1202...
Datasheet
ADE1202 on Analog.com

  • State Not Answered
  • Replies 1 reply
  • Subscribers 53 subscribers
  • Views 464 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		












	
	
			
	
			
		
	
	
		

		
ADE1201/02 Input Voltage Limits



		

			

									
					    michaelb
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 10, 2020 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hey.
    

    ADE1201/02 specifies "Application circuit monitors wide voltage range ±10 V dc to ±300 V dc 8 V rms to 240 V rms ac".
    

    On the other hand - AN-2034 (Configuring the ADE1202 Registers for a Protective Relay Application) specifies " The binary input is designed for 10 V dc to 300 V dc or 8 V rms to 240 V rms ac operation."
    

    What are these limits apply for? Am i capable of measuring an isolated analog signal below 10V? 
    

    

    From the application Note it seems every voltage can be monitored with suitable voltage divider that lowers the maximum voltage below Maximum Input Voltage of 1.25V
    

    Am i missing something?
    

    

    Thanks in advance.
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Integrated/Special Purpose A/D Converters
                
                                                    
                 ADE1202
                
                                                    
                 Isolated A/D Converters
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

    • 
	
      



	
		
	
	



      
	
      
		
      
							
					
      
		
      
			
													0
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Aug 12, 2020 5:59 PM
            
            
					
      
	
      

		
		
      
					
      Hi:
      


      The part is designed to work with a voltage divider to make sure the device FS at the device pin (IN1/IN2) of 1.25V is adhered to.
      

      The input is divided down via a voltage divider and so that choice influences what your full scale input is. If FS input signal is 300V then the resolution (8 bit ADC) is ~ 1.17V on gain 1. Resolving inputs lower 10V is harder because of possible noise on the 300V line.
      

      If you pick a divider that puts your input FS at say 24V on gain 1, then you could potentially resolve 94mV.
      

      I hope this makes sense.
      

      Thanks.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

      •