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ADuM4120 Production
The ADuM4120/ADuM4120-1 are 2 A isolated, single-channel drivers that employ Analog Devices, Inc., iCoupler® technology to provide precision isolation...
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ADuM4120 on Analog.com

ADuM4121 Production
The ADuM4121/ADuM4121-1 are 2 A isolated, single-channel drivers that employ Analog Devices, Inc.’s iCoupler® technology to provide precision isolation...
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ADuM4121 on Analog.com

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ADuM4120/1 frequency graph only go to 500 kHz



		

			

									
					    ESanz
					
							

			
				
									
											
			
			
				
  •  Analog Employees  

			
			
			    	
			                    
                
				                on Apr 29, 2021 
				
			
			
		


				
		

		    		    
		    
		    	
			
The minimum pulse width is 50 ns, which means a 20 MHz period. Why does the ADuM4120/1 frequency graph only go to 500 kHz?

										


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[edited by: EstiS at 2:03 PM (GMT -4) on 19 May 2021]
				

					


				
				
		

			
						
									
									
						
						
			
			
			
			
		


        
        

					

			






	
















	

	

					



			








	
	
	
	



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    •  Analog Employees  
    
            
			                            
                        
                on Apr 30, 2021 10:41 AM
            
            
					
    
	
    

		
		
    
					
    The resolution of the duty cycle of the ADUM4221 allows for very fine pulse width minimums, but when the operating frequency is brought very high, the quiescent current of the device goes up dramatically.
    

    This quiescent current is too large for recommended operation of the part, therefore the operation should be targeted at sub-MHz frequencies.
    

    Higher frequency operation is possible, but care must be taken to ensure the self-heating of the device is not too large.
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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													+1
							
			
				
									
							        
			
			
			
    •  Analog Employees  
    
            
			                            
                        
                on Apr 30, 2021 10:41 AM
            
            
					
    
	
    

		
		
    
					
    The resolution of the duty cycle of the ADUM4221 allows for very fine pulse width minimums, but when the operating frequency is brought very high, the quiescent current of the device goes up dramatically.
    

    This quiescent current is too large for recommended operation of the part, therefore the operation should be targeted at sub-MHz frequencies.
    

    Higher frequency operation is possible, but care must be taken to ensure the self-heating of the device is not too large.
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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