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REF01 Production
The REF01/REF02 are industry-standard precision voltage references. The stable 10V output of the REF01 can be adjusted over a ±6% range with minimal effect...
Datasheet
REF01 on Analog.com

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REF01 Internal trim adjustment circuit

		            
		

			

									
					    Jiro
					
							


			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 4, 2019 
				
			
			
		
    
		
     
				
		
    
		    		    
		    
		    	
			
    Hi,
    

    Please give me the resistance values of R5, R6, R20, and VBG Voltage of Figure 33. I would like to calculate the calibration range of trim adjustment circuit which has some difference with figure 35.
    
									
			        
		
    

				
						
        

    
    Tags: 
                                            
                 Series Voltage References
                
                                                    
                 voltage references
                
                                                    
                 ref01
                
                                
            
    
    
    

		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
      
	

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      •  Analog Employees  
      
            
						
                            
            
            				
            
                on Apr 4, 2019 1:36 PM
            
                                    
					
      
	
      

		
		
      
					
      Hi Jiro,
      

      

      As stated in REF01 data-sheet "Newer designs should use ADR01". ADR01 offer high accuracy and temperature stability over wider operating range and maintains full pin to pin compatibility with the REF01. After analyzing the schematic R5 = 35k, R6~ 4.137k and R20= 20k. Please note for finer VOUT adjustment please add a series 470k resistor connecting trim pin. The core band gap voltage VBG = 1.057 V. 
      

      Please let me know if you have any additional questions.
      

      

      Regards,
      

      Anshul
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
				
						
						
				
				
		
		
      
			
		
      
	
      

      

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