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Temperature Grade Reliability

		
	
				

			

									
					    Markze
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Apr 7, 2020 
				
			
			
		

		
		                     
				
        		

		    
		    		    
		    			

			    
Hi,




In ADI Linear power temperature, there is temperature grade E I H etc...




However, as far as I understand, the difficult between grade "E" and grade "I" is whether the part are guaranteed to meet specifications from  –40°C to 85°C junction temperature.




Grade "I" 100% guarantee to meet specifications from  –40°C to 85°C. Grade "E" is only guarantee to meet specifications from  0°C to 85°C.




However, Both "E" and  "I" is described their operating temperature is from -40°C to 85°C. Might I know if any difference in their Reliability? Can we apply to "E" device under minus degree?




Thank you.




Mark.

			

			
									
		                             
                        

    

                                            
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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Apr 16, 2020 3:58 AM
            
            
						
			            		
    
		
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    Hi Mark,
    

    I pick LTC3007A as an example.  Both E and I are rated and can be used at –40°C to 125°C.
    

    Production lots go through a rigorous outgoing electrical quality tests that include 100% tested after packaging at 25°C to all datasheet’s electrical characteristic. Furthermore, each production lot is sample testing at hot and cold junction temperatures to some of the datasheet’s electrical characteristic as noted by red dot shown under conditions column of the specification table. It is important to note that if at any point a single part fails during sample testing, the lot will be 100% tested. The E-grade and I-grade products have a different sampling plan at these junction temperatures.
    

    - The E-grade sampling plan is 125 to 315 pieces sampled at 0°C and at 85°C. Specifications over the –40°C to 125°C operating junction temperature range are assured by design, characterization, and correlation with statistical process controls. 
    - The I-grade sampling plan is 1,000 pieces sampled at -40°C and at 125°C.
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
				
				
				
		
		
    
			
		
    
	
    

    

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                on Mar 19, 2021 12:38 PM
            
            
												
						in reply to Fil
					
										
			            		
    
		
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    May I ask what is the H-grade sample? 
    

    are the sampling plan and the temperature the only different between the E, I and H garde
    

    

    Regards
    

    Gionata
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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    •  Analog Employees  
    
            
						
                            
            
            				
            
                on Apr 1, 2021 7:17 PM
            
            
												
						in reply to gionatav
					
										
			            		
    
		
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    Hi Gionata,
    

    Sort of yes. Please use this as reference. www.analog.com/.../2PB_MP.pdf
    

     
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
				
				
				
				
		
		
    
			
		
    
	
    

    

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