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ADG441 Not Recommended for New Designs
The ADG441 is a monolithic CMOS device comprising four independently selectable switches. It is designed on an enhanced LC2MOS process which provides low...
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ADG441 on Analog.com

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ADG441 Implementation

		
	
				

			

									
					    jtproject
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Mar 18, 2015 
				
			
			
		
    
		
		                    	    
    
        	    
    Thread Summary
    
                The user is troubleshooting an ADG441 setup where the signal at D1 does not change with the logic input at IN1. The final answer suggests checking the pull-up or pull-down resistors on the logic input and testing with a DC signal at S1, noting that a low logic input should keep the switch on.
                        	    
    
                
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    I am having trouble getting the ADG441 to work properly and want to confirm that my setup is correct. To test the chip, I made the following connections:
    
 
    analog ground/0v to GND
    
 
    -9v to Vss
    
 
    +9v to Vdd
    
 
    0.5v 1KHz sine wave to S1
    
 
    Logic input of 0v or 5v to IN1
    
 
    No matter if I give IN1 0v or 5v, the signal received at D1 is always the same signal connected to S1. What am I doing wrong in my setup that is preventing the switch from opening?   
    
			
    
			
									
		                             
                        

    
    
                                            
                 Dual-Supply Analog Switches and Multiplexers
                
                                                    
                 ADG441
                
                                                    
                 Analog Switches Multiplexers
                
                                                    
                 Switches & Multiplexers
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Mar 19, 2015 2:30 PM
            
            
						
			            		
      
		
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      Hi Jody,
      
 
      Are you using pull up or pull down resistors on the logic input?  It would be worth changing the resistor value if you are.  Note for the ADG441, when the logic is low the SPST switch should be on.  Also worth testing using a  DC signal at first on S1 as the simplest use case.  
      
 
      Regards,
      
 
      Eric.
      
 

       
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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