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Formula for ADR0x TRIM resistors



		

			

									
						TedH4faro
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 20, 2017 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    I would like to use the TRIM pin with fixed resistors rather than a potentiometer to set the ADR01 output to a voltage other than nominal, within the specified adjustment range.  Is there a formula to determine the appropriate resistor values?  I could breadboard it then measure the potentiometer setting, but if you can provide a formula, that would be quicker and easier. 
    
 
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

					
    
			
    


    

	
    
		
	
    















    
	
    
	
    
					



			








	
	
	
	



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                on Nov 17, 2017 7:29 PM
            
            
					
        
	
        

		
		
        
					
        I am using the ADR01 to generate a 10V reference input to a DAC.  I am using an AMP03 to produce the -10V reference.  I was getting some glitch noise on the DAC output, so, I added a lowpass filter to the negative reference input.  The reference input has an input resistance, so my filter was causing a slight attenuation in the reference voltage.  The 10.03V figure is to compensate for this loss.
        
			
        

		
		
		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
						
				
						
				
				
		
		
        
			
		
        
	
        

        

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													0
							
			
				
									
							        
			
			
			
          
            
			                            
                        
                on Nov 17, 2017 7:29 PM
            
            
					
          
	
          

		
		
          
					
          I am using the ADR01 to generate a 10V reference input to a DAC.  I am using an AMP03 to produce the -10V reference.  I was getting some glitch noise on the DAC output, so, I added a lowpass filter to the negative reference input.  The reference input has an input resistance, so my filter was causing a slight attenuation in the reference voltage.  The 10.03V figure is to compensate for this loss.
          
			
          

		
		
		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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