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ADG4612



		

			

									
					    kschoen@mevion.com
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 17, 2012 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I am having a problem with an analog switch that we get from MAXIM.  I would like to replace it with an ADG4612 or ADG1611 it will
    
 
    run from +6V to GND the signal inputs are less than 5V in a DC circuit.  I have attached the circuit for reference.  Any suggestions that 
    
 
    you might have would be appreciated.  The circuit selects between 1 or 10 uA of output current by bypassing the resistor with an analog
    
 
    switch.  I was leaning toward the ADG4612 because the data sheet states that it has no power sequencing requirements.
    
 
    thanks for your help.
    
 
    Kirk
    
								
    

				
							ADI_analogswitch.pdf
					
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		
	
    















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Sep 18, 2012 7:14 PM
            
            
					
      
	
      

		
		
      
					
      Hi Kirk,
      
 
      What problems did you have with circuit?
      
 
      If you have scenario whereby signals can be present at the analog inputs before power is present, then the ADG4612 is a good solution.  The ADG4612 will behave like a high impedace input without power and switch will remain off ensuring no current flow .  With 6V supply the ADG4612 will have 8ohms Ron typically.
      
 
      Rgds,
      
 
      Theresa.
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Sep 19, 2012 5:49 PM
            
            
					
        
	
        

		
		
        
					
        Thanks for the help The ADG1612 has much lower leakage currents will this
        
 
        also be a good choice for the application.
        
 
        kirk
        
 
        On Tue, Sep 18, 2012 at 11:15 AM, theresaC <
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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        •  Analog Employees  
        
            
			                            
                        
                on Sep 19, 2012 8:04 PM
            
            
					
        
	
        

		
		
        
					
        Hi,
        
 
        From a performance viewpoint, the ADG1611 has lower leakage than the ADG4612.
        
 
        However, the ADG4612 offers additional benefits in terms of being guaranteed Off without power so it really comes down to how the part will be used in system.
        
 
        If you can guarantee that part is powered prior to analog inputs being applied and that there is no over-voltage condition, then the ADG1612 should work fine.
        
 
        Rgds,
        
 
        Theresa.
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
						
						
				
				
		
		
        
			
		
        
	
        

        

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