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(ADuM12xN)How to calculate the supply current when each channel's duty and frequency are not same.



		

			

									
						donadona999s
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Jan 28, 2019 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hi !




I already asked ADuM14x Power supply at past.


https://ez.analog.com/interface-isolation/f/q-a/87044/adum14x-how-to-calculate-the-supply-current-when-each-channel-s-duty-and-frequency-are-not-same


Can you give us same kind of power supply formulas for ADuM12xN?




We want to know this because one of our customer is thinking to change  ADuM321x to ADuM12xN.




Best regards


Kawa

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



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                                 Analog Employees 
                                
                            
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                on Jan 31, 2019 3:49 AM
            
            
												
						in reply to donadona999s
					
									
    
	
    

		
		
    
					
    Hi Kawa:
    

    For ADuM120N:
    

    IDD1 = IDD1(Q) + (2.8mA * D_A + 0.01mA/Mbps * F_A) + (2.8mA * D_B + 0.01mA/Mbps * F_B)
    

    IDD2 = IDD2(Q) + (0.02mA/Mbps * F_A)+ (0.02mA/Mbps * F_B)
    

    For ADuM121N:
    

    IDD1 = IDD1(Q) + (2.8mA * D_B + 0.01mA/Mbps * F_B) +(0.02mA/Mbps * F_A)+
    

    IDD2 = IDD2(Q) + (0.02mA/Mbps * F_B)+ (3.4mA * D_A + 0.01mA/Mbps * F_A) 
    

    The formula is similar with ADuM14x because they are using the same coil architecture. the difference is number of channels and directions.
    

    

    Regards
    

    Chris
    

    

    

     
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
				
						
						
				
				
		
		
    
			
		
    
	
    

    

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