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ADF4372 3.3V Operation



		

			

									
						mroman
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Feb 27, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I have two questions:
    

    1. What voltage is VCC_REG_OUT?
    

    2. What changes to the circuit need to be made to change from VCC_VCO=5V to VCC_VCO=3.3V operation?
    

    

    Thanks,
    

    Michael
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

					
    
			
    


    

	















    
	
    
	
    
					



			


				
	









	
      
	

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													+1
							
			
				
									
							        
			
			
			
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                on Feb 28, 2022 4:52 PM
            
            
					
      
	
      

		
		
      
					
      Hi Michael,
      

      We recommend using an external LDO for 3.3V operation too. For this reason, VCC_REG_OUT should be left open. All needed is connecting 3.3V supply to VCC_VCO and VCC_LDO pins for hardware side. The ALC settings should be set for 3.3V operation when programming the part.
      

      Regards,
      

      Kazim 
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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