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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...
Datasheet
ADXL355 on Analog.com

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EVAL-ADXL355-SDP Filter setting and 0x28 result.

		
	
				

			

									
					    Osamu
					
							

            
            			
				
									
											
			
			
				
    
			
			
			    	
			                    
                
				                on Oct 23, 2023 
				
			
			
		
    
		
		                     
				
        		
    
		    
		    		    
    
		      		            		        
    Category: Software
    
    		        		            		    
    Product Number:  ADXL355 
    
    		        		    		    
    
		    		    
		    			
    
			    
    Hello.
    


    I have a question regarding the filter settings of the evaluation board software.
    The setting is selected from the ODR and HPS pull-down menus, but there is 
    a difference between the values in Table 44 of the data sheet and the setting of 0x28.
    I have attached a comparison table, but with the settings of this software, f
    or example, ODR250Hz and HPF1.5545E-4xODR, you will not be able to 
    get a proper output.
    I can't tell if the cause is the software or if I'm using it incorrectly.

    Bset Regards.
    

    

    


    
ADXL355 Filter Register












    

    














    

    
Possible correct register settings read from the datasheet（HEX）











    

    
　
ODR

    

    
4000 Hz
2000 Hz
1000 Hz
500 Hz
250 Hz
125 Hz
62.5 Hz
31.25 Hz
15.625 Hz
7.813 Hz
3.906 Hz

    

    
HPF corner frequency
no high-pass filter
0
1
2
3
4
5
6
7
8
9
A

    

    
24.7E−4×ODR
10
11
12
13
14
15
16
17
18
19
1A

    

    
6.2084E−4×ODR
20
21
22
23
24
25
26
27
28
29
2A

    

    
1.5545E−4×ODR
30
31
32
33
34
35
36
37
38
39
3A

    

    
0.3862E−4×ODR
40
41
42
43
44
45
46
47
48
49
4A

    

    
0.0954E−4×ODR
50
51
52
53
54
55
56
57
58
59
5A

    

    
0.0238E−4×ODR
60
61
62
63
64
65
66
67
68
69
6A

    

    














    

    
Register values when set by software of EVAL-ADXL355-SDP（HEX）











    

    
　
ODR

    

    
4000 Hz
2000 Hz
1000 Hz
500 Hz
250 Hz
125 Hz
62.5 Hz
31.25 Hz
15.625 Hz
7.813 Hz
3.906 Hz

    

    
HPF corner frequency
no high-pass filter
0
1
2
3
4
5
6
7
8
9
A

    

    
24.7E−4×ODR
A
B
A
B
E
F
E
F
A
B
A

    

    
6.2084E−4×ODR
14
15
16
17
14
15
16
17
1C
1D
1E

    

    
1.5545E−4×ODR
1E
1F
1E
1F
1E
1F
1E
1F
1E
1F
1E

    

    
0.3862E−4×ODR
28
29
2A
2B
2C
2D
2E
2F
28
29
2A

    

    
0.0954E−4×ODR
32
33
32
33
36
37
36
37
3A
3B
3A

    

    
0.0238E−4×ODR
3C
3D
3E
3F
3C
3D
3E
3F
3C
3D
3E

    
    

    
			
    
			
									
		                             
                        

    
    
                                            
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