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ADXL355 Recommended for New Designs
The analog output ADXL354 and the digital output ADXL355 are low noise density, low 0 g offset drift, low power, 3-axis accelerometers with selectable...
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ADXL355 on Analog.com

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ADXL355 temperature sensor output at 25C: 1852 or 1885 LSB?



		

			

									
					    ari1000
					
							

			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Nov 29, 2023 
				
			
			
		
    

				
		
    
		    		    
		    
		    		      		            		        
    Category: Hardware
    
    		        		            		    
    Product Number:  ADXL355 
    
    		        		    		    	
			
    ADXL355 data sheet Rev A states "TEMPERATURE SENSOR Output at 25°C 1852 LSB"
    

    www.analog.com/.../adxl354_355.pdf
    

     
    

    

    and data sheet Rev B states "TEMPERATURE SENSOR Output at 25°C 1885 LSB"
    

    www.analog.com/.../adxl354_adxl355.pdf
    

     
    

    

    Which one is correct?
    

    Does it depend on what revision of ADXL355 part I have?
    

    Thanks, Ari
    
										

    
				Added links to data sheets.
    
[edited by: ari1000 at 2:03 PM (GMT -5) on 29 Nov 2023]
				
    
						
			        
		
    

				
						
        

    
    Tags: 
                                            
                 hardware
                
                                                    
                 accelerometers
                
                                                    
                 adxl355
                
                                                    
                 Sensors and MEMS
                
                                                    
                 temperature sensor
                
                                
            
    
    
    

		
    
			
						
									
									
						
						
			
			
			
			
		
    

        
        

					
    
			
    


    
















    
	
    
	
    
					



			








	
	
	
	



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							FormerMember
					
      
		
      
			
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									FormerMember
							        
			
			
			
    
            
						
                            
            
            				
            
                on Dec 1, 2023 11:11 AM
            
            
					
    
	
    

		
		
    
					
    Hi    
    

    

    The value in data sheet Rev B is correct, and it doesn't depend on the part's revision.
    

    

    Regards,
    

    Mohammad
    
			
    

		
			
	      

		
		
	
    
	
    
		
    
			
		
    
	
    
	
    
		
						
						
						
						
				
				
		
		
    
			
		
    
	
    

    


	

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                on Dec 6, 2023 7:54 AM
            
            
												
						in reply to FormerMember
					
									
      
	
      

		
		
      
					
      Thanks Mohammad,
      

      I'd still like to double check am I getting the right temperature reading from ADXL355.
      

      I soldered thermocouple to ADXL355 Vss pin (see the pic). In steady room temperature (19.2C) TC measured 19.2C and at the same time ADXL355 was reporting 24.7C. ADXL355 was in "measurement mode" all the time and it had reached equilibrium state where it was not warming up.
      

      Is 5 .5 centigrade temperature difference reasonable? I understand my measurement setup with TC is not exactly "state of art"...
      

      Cheers,
      

      Ari
      

       
      
			
      

		
			
	      

		
		
	
      
	
      
		
      
			
		
      
	
      
	
      
		
						
						
				
						
				
				
		
		
      
			
		
      
	
      

      

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													0
							
			
				
									
							        
			
			
			
          
            
						
                            
            
            				
            
                on Dec 6, 2023 7:54 AM
            
            
												
						in reply to FormerMember
					
									
          
	
          

		
		
          
					
          Thanks Mohammad,
          

          I'd still like to double check am I getting the right temperature reading from ADXL355.
          

          I soldered thermocouple to ADXL355 Vss pin (see the pic). In steady room temperature (19.2C) TC measured 19.2C and at the same time ADXL355 was reporting 24.7C. ADXL355 was in "measurement mode" all the time and it had reached equilibrium state where it was not warming up.
          

          Is 5 .5 centigrade temperature difference reasonable? I understand my measurement setup with TC is not exactly "state of art"...
          

          Cheers,
          

          Ari
          

           
          
			
          

		
			
	      

		
		
	
          
	
          
		
          
			
		
          
	
          
	
          
		
						
						
				
						
				
				
		
		
          
			
		
          
	
          

          

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							FormerMember
					
          
		
          
			
													+1
							
			
				
									FormerMember
							        
			
			
			
        
            
						
                            
            
            				
            
                on Dec 6, 2023 2:32 PM
            
            
												
						in reply to ari1000
					
									
        
	
        

		
		
        
					
        Hi    
        

        

        After consulting with our engineering team, we determined that the standard deviation for the temperature sensor's typical output at 25°C is 27LSB. So, it seems that your temperature reading from ADXL355 is reasonable. 
        

        

        Regards,
        

        Mohammad