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About unused channels of ADN4663/ADN4664



		

			

									
						nrsk
					
							

			
				
									
											
							 		
		        	            							
			
			    	
			                    
                
				                on Jan 19, 2021 
				
			
			
		


				
		

		    		    
		    
		    	
			
Hello,


I would like to confirm about unused channels of ADN4663/ADN4664.

What is the recommended state of input/output pins? (Open or termination?)


Best Regards,


nrsk

								


				
				
		

			
						
									
									
						
						
			
			
			
			
		


					

			





	










	

	

					



			








	
	
	
	



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                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Jan 20, 2021 1:09 PM
            
            
					
    
	
    

		
		
    
					
    Hi Nrsk, 
    

    I would recommend not terminating the unused output of the ADN4663. This will save on power consumption. You can also terminate this output, but the power consumption of the ADN4663 will be slightly higher. 
    

    The ADN4664 unused input should not be left floating. I would recommend any of these options:
    

      

    1. Connecting the ADN4664 unused input to the unused output of the ADN4663, so that the input is driven.
      2. 

    2. Connecting ADN4664 RIN2+ to VCC and RIN2- to GND. (Set unused output to logic 1)
      3. 

    3. Connecting ADN4664 RIN2+ to GND and RIN2- to VCC. (set unused output to logic 0)
      4. 

    

    Regards,
    

    Neil 
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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													+1
							
			
				
									
							        
            
                                                                                                        
      
                            
    • 
                                 Analog Employees 
                                
                            
      • 
                        
     
                                                           			
			                            
                        
                on Jan 20, 2021 1:09 PM
            
            
					
    
	
    

		
		
    
					
    Hi Nrsk, 
    

    I would recommend not terminating the unused output of the ADN4663. This will save on power consumption. You can also terminate this output, but the power consumption of the ADN4663 will be slightly higher. 
    

    The ADN4664 unused input should not be left floating. I would recommend any of these options:
    

      

    1. Connecting the ADN4664 unused input to the unused output of the ADN4663, so that the input is driven.
      2. 

    2. Connecting ADN4664 RIN2+ to VCC and RIN2- to GND. (Set unused output to logic 1)
      3. 

    3. Connecting ADN4664 RIN2+ to GND and RIN2- to VCC. (set unused output to logic 0)
      4. 

    

    Regards,
    

    Neil 
    
			
    

		
		
		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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