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AD640 Production
The AD640 is a complete monolithic logarithmic amplifier. A single AD640 provides up to 50 dB of dynamic range for frequencies from dc to 120 MHz. Two...
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AD640 on Analog.com

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Confirm die markings to top markings

		
	
				

			

									
					    DLeRoy
					
							

            
            			
				
									
											
			
			
				
			
			
			    	
			                    
                
				                on Feb 3, 2026 
				
			
			
		

		
		                    	    

        	    
Thread Summary

                The user inquired about confirming the die markings (AD640 ADI M 1988) and back side injector markings (04, 07, 17) for the part number P/N AD641AP. Analog Devices support stated that they cannot verify parts by markings and advised ensuring purchases are made through authorized distributors to guarantee authenticity. The user sought further confirmation on die markings, but Analog Devices reiterated that authenticity can only be verified through the point of purchase.
                        	    

                
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 We have P/N AD641AP with Date Codes 0043, 0045, 0313, and 0320. The Die (wafer) marking found on all devices is AD640 ADI  M  1988. The back side injector had PHILIPPINES with various numbers such as 04,07 etc. which varies but not unusual to see. If someone can confirm die markings to this P/N and also confirm that the markings 04, 07, 17 are not unusual that would help our inspection process.

 
thanks,

 
Don

			

			
									
		                                 
Thread Notes  

                

        
                                        
                        

    

                                            
                 RF Power Detectors
                
                                                    
                 ad640
                
                                                    
                 Logarithmic Detectors
                
                                                    
                 ad641ap
                
                                
            

    
    
		


							

				
				
			

					
				        
        		

			
						
									
												
			
			
                        
                                    
                        
                                                    
                        
            
			            
						
						
			
			
			
			
		


        
        
        
    
					

			





















	

	

					



			


				
	









	




	
			








	






































     



















		        
        

            
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