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AD7730L Production
The AD7730L is a complete analog front end for weigh-scale and pressure measurement applications. The device accepts low-level signals directly from a...
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AD7730L on Analog.com

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AD7730L failure



		

			

									
					    Chan_KT
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Apr 27, 2018 
				
			
			
		
    

				
		
    
		    		    
		    
		    	
			
             Hi!, I am using AD7730L to reading loadcell signal in LPG gas filling machine, but there are some failure of this AD7730L after 2 years operation in LPG gas filling  plant.
    
 
             After investigation, i found the resistance of REF IN & AIN1 pins is only remain a few kilo-ohm instead of mega-ohm range when refer to AGND pin.
    
 
              The AVdd pin of AD7730L is supplied with 6.3V instead of 5V, will this configuration shorten the life span of AD7730L in long term?  
    
 
    please refer to attached schematic.
    
 
    Any advice? 
    
 
    Thanks.
    
								
    

							
    
				
				
			
    
					
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	















    
	
    
	
    
					



			








	
	
	
	



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