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ADG1606 Production
The ADG1606 and ADG1607 are monolithic iCMOS® analog multiplexers comprising of 16 single channels and eight differential channels, respectively. The...
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ADG1606 on Analog.com

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Mux inputs above the positive supply rail?

		
	
				

			

									
					    chooks
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Jun 3, 2026 
				
			
			
		

		
		                     
				
        		

		    
		    		    

		      		            		        
Category: Datasheet/Specs

    		        		            		    
Product Number:  ADG1606  

    		        		    		    

		    		    
		    			

			    
I have a circuit design with the ADG1606.  The positive supply rail is +3.3V and the negative rail is ground.  Are there internal protections against voltages on the inputs that are above the positive rail?  For example, one of the inputs on the board was +4V.  Will overdriving the inputs damage the IC?




Thanks.

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Jun 4, 2026 2:20 AM
            
            
						
			            		
    
		
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    Hi,  .

    Yes, the ADG1606 has internal clamp diodes to the rails, but it is not intended to tolerate sustained input voltages above VDD. A +4 V input on a 3.3 V-powered ADG1606 violates the recommended operating range and forward-biases the internal clamp diode. It may survive if the current is limited to within the absolute maximum rating, but if the source can force excessive current, the device can be damaged.

    Best regards,
    Christian
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    

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