Products Mentioned

ADuM142E Recommended for New Designs
The ADuM142E1 is a quad-channel digital isolator based on Analog Devices, Inc., iCoupler® technology. Combining high speed, complementary metal-oxide...
Datasheet
ADuM142E on Analog.com

ADUM1251 Production
The ADuM1250/ADuM1251 are hot swappable digital isolators with non-latching, bidirectional communication channels that are compatible with I2C interfaces...
Datasheet
ADUM1251 on Analog.com

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ADUM14xE operation voltage

		            
		

			

									
					    Micha70
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on May 7, 2021 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Hi everyone,
    

    it's possible to use the ADUM142E and ADUM1251 in mixed powersupply mode?
    

    VDD1 =+3V3 and VDD2=1V8
    

    In the datasheet is always explained the typical voltage range for 5V/3V3 or 1V8
    

    

    thx
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 ADUM142E
                
                                                    
                 Digital Isolation Technology
                
                                                    
                 Standard Digital Isolators
                
                                                    
                 adum1251
                
                                                    
                 I<sup>2</sup>C Isolators
                
                                
            
    
    
    

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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													+1
							
			
				
									
							        
			
			
			
      •  Analog Employees  
      
            
						
                            
            
            				
            
                on May 7, 2021 5:34 AM
            
                                    
					
      
	
      

		
		
      
					
      Hello Micha,
      

      the ADuM142E and ADuM1251 are  'isolators', hence no connection between VDD1/GND1 towards VDD2/GND2.
      

      As both parts offer signal level translation this scenario demands for mixed power supply levels.
      

      ADuM142 offers 1.8-5,5V VDDx range and ADuM1251 offers 3,0V-5,5V as VDDx range.
      

      The specified parameters are always stated for VDD1=VDD2, to limit the amount of data and reduce test time.
      

      

      kind regards
      

      Markus
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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