Products Mentioned

AD680 Production
The AD680 is a bandgap voltage reference which provides a 2.5 V output from inputs between 4.5 V and 36 V. The architecture of the AD680 enables the reference...
Datasheet
AD680 on Analog.com

AD780 Production
The AD780 is an ultrahigh precision band gap reference voltage that provides a 2.5 V or 3.0 V output from inputs between 4.0 V and 36 V. Low initial error...
Datasheet
AD780 on Analog.com

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AD680 adding tow capacitor

		
	
				

			

									
					    Osamu
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Aug 2, 2013 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
		    			
    
			    
    Hello.
    
 
    Do you have a graph of the Compensation and Load Capacitor Combinations?
    
 
    Or is the same as the Compensation and Load Capacitor Combinations of AD780 Fig 6?
    
 
    Thank you.
    
			
    
			
									
		                             
                        

    
    
                                            
                 Series Voltage References
                
                                                    
                 ad780
                
                                                    
                 Shunt Voltage References
                
                                                    
                 voltage references
                
                                                    
                 AD680
                
                                
            
    
    
    
		
    

				
				        
        		
    
			
						
									
												
			
			
                        
                                    
                        
                        
                        
            
			            
						
						
			
			
			
			
		
    

        
        
        
    
					
    
			
    


    
















    
	
    
	
    
					



			


				
	









	
            
						
                            
            
            				
            
                on Aug 6, 2013 5:36 AM
            
            
						
			            		
    
		
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    Osamu-san,
    
 
      Why do you want to design with a part that came out in 1991, when there are more than a dozen other 2.5V references?  Look at the ADR431 that came out in 2004.  Lower noise, better specs,  Has a comp pin that
    
 
    few other refs have.  See pages 16-17 on high freq noise.
    
 
    Harry
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
						
				
				
		
		
    
			
		
    
	
    

    


	

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Aug 7, 2013 6:08 PM
            
            
						
			            		
    
		
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    Hi, Osamu.
    
 
    According to the applications engineer of AD680, ADI does not guarantee the performance of AD680 when a capacitor is connected between the TEMP pin and ground because AD680 was not designed for that purpose.
    
 
    As alternative, you may try the newer part like the ADR4525 or if a compensation capacitor is still required use ADR431.
    
 
    Hope this helps! Let me know if you have other concern.
    
 
    Regards,
    
 
    Anna
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    

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                on Aug 8, 2013 1:44 AM
            
            
						
			            		
      
		
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      Thank you for your advice.
      
   
      
  
      
  
      
 
      
 
      
 
      
  
      
   
      
    
      
     
      
      I replace the AD680 from the reference IC of others.
     
      
     
      
      It uses a capacitor larger than AD recommended for the circuit. 
     
      
     
      
      
      I want to know  a safe to be replaced as it.
      
     
      
    
      
   
      
  
      
 
      
 
      I want to use the AD680 because I'm using it in other sets.
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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                on Aug 2, 2018 10:26 AM
            
            
						
			            		
        
		
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        This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

        Thank you,
        EZ Admin
        
			
        

		
			
	      

		
		
	
        
	
        
		
        
			
		
        
	
        
	
        
		
						
				
						
						
				
				
		
		
        
			
		
        
	
        

        

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