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ADuM1441 Recommended for New Designs
The ADuM1440/ADuM1441/ADuM1442/ADuM1445/ADuM1446/ADuM1447 are micropower, 4-channel digital isolators based on the Analog Devices, Inc., iCoupler® technology...
Datasheet
ADuM1441 on Analog.com

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					    jcgeluk
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Sep 4, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Hi,
    

    I am puzzled.
    

    Fig 1 of the datasheet suggest there are 2 bi-directional channels and two one-way channels.
    

    Table 23 shows 4 on-way channels; 3 from left to right, 1 from right to left.
    

    Which ones are bidirectional, which ones are uni directional?
    

    Joost
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
			                            
                        
                on Sep 6, 2018 8:43 PM
            
            
					
      
	
      

		
		
      
					
      Hello Joost,
      

      The ADuM144x has no bidirectional channels.  All channels have fixed direction.  There are different combinations of direction so that you can choose the one that works with your design.  For example the ADuM1441 has three channels that go from side 1 to side 2, and one that goes from side 2 to side 1.  If you need the opposite combination, you can flip the chip around.  So three directional combinations covers all possibilities.  The ones that look like bidirectional are just the ones that have different values depending on the part number.
      

      

      Best Regards,
      

      MSCantrell
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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