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The AD7414/AD7415 are complete temperature monitoring systems in 6-lead and 5-lead SOT-23 packages. They contain a band gap temperature sensor and a 10...
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AD7415 on Analog.com

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Change address of AD7415 after power-up / dynamic I²C address



		

			

									
					    am_2015
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 9, 2022 
				
			
			
		
    

				
		
    
		    		    
		    
		    		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  AD7415 
    
    		        		    		    	
			
    The AD7415 can have 3 different I²C addresses depending of state of AS pin (unconnected, GND, VCC)
    

    

    Can I change state of AS pin and I²C address after device has powered-up?
    

    

    I´d like to have many AD7415 on the same I²C line, and use multiplexer (74LS138), so that only one AD7415 has AS pin LOW, while all the others would have AS pin HIGH, and then use address 0x4A (AS pin LOW)
    

    

    Unfortunately there is no answer in this thread:
    

     https://ez.analog.com/temperature_sensors/f/q-a/77381/how-can-ad7415-device-transients-think-it-is-a-wrong-i2c-address 
    

    

    Thank you
    
								
    

				
				
		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    


	
    
		






		

			
    
			
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      •  Analog Employees  
      
				
						
						                        
                                                
                        
                                                	 Nov 11, 2022 
						
										
						
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      HI  ,
      


      We wouldn't recommend doing this, as the part wasn't designed to operate this way. Trying this configuration could work, but there is no guarantee. 

      I'd also like to add that although…
      
				
			
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      •  Analog Employees  
      
            
			                            
                        
                on Nov 11, 2022 11:23 AM
            
            
					
      
	
      

		
		
      
					
      HI  ,
      


      We wouldn't recommend doing this, as the part wasn't designed to operate this way. Trying this configuration could work, but there is no guarantee. 

      I'd also like to add that although you can only have 3 different I2C addresses for the same device, there are two types(AD7415-0 and AD7415-1) of devices that are specifically made for you to have a total of 6 (two devices x 3 possible address pin configuration) I2C configurable addresses for the AD7415. Please see Table 4 of the datasheet for more details.

      Regards,
      Karlo
      
			
      

		
		
		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
						
						
				
				
		
		
      
			
		
      
	
      

      

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