• State Verified Answer
  • Replies 3 replies
  • Subscribers 32 subscribers
  • Views 1750 views
  • Users 0 members are here
Options
Related 

        

            Post
             Go back to editing
        

    

    


    

    









		












	
	
			
	
			
		
	
	
		

		
AD5660 with Internal ref 1.25V 5ppm : Refout=2.5V 400ppm ?



		

			

									
					    Edward.K
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 9, 2012 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
    Good day!
    
 
    I'm examine two parties of AD5660ARJ-1 (about 20 units same kind) with SOT-23 packaging
    
 
    label D30 (AD5660ARJ-1) and D5G (AD5660ARJZ-1)  - both must have 1.25V internal reference,
    
 
    but at pin 2 they demonstrate 2.5V. At output pin, with writed code
    
 
    0x3fff, some about 1.25V with temperature depend about 1mV per gradus
    
 
    C (400ppm vs declared 5ppm).
    
 
    Please see applied picture for aplication shem.
    
 
    What would your recommend?
    
 
    Thanks.