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Topic: ADXL362(acceloremeter) (Read 317 times) previous topic - next topic

MovieFan1995

My English is not very good
So feel free to ask, if you didn't understand what i have said
to detect free fall in adxl362, the recommended value is 600 mg which is the THRESH_INACT
there are two equations one in page 27 and other 37 to find this value
 
how to find this value?
and whats(code per g)?



datasheet:https://www.analog.com/media/en/technical-documentation/data-sheets/adxl362.pdf

MovieFan1995


pylon

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and whats(code per g)?
That's determined by the Measurement Range Selection (set in the Filter Control Register). If that's set to 2g and you have a resolution of 11bit, one "code" is a bit less than 1mg (2g / 2048).

Quote
how to find this value?
Which value?

MovieFan1995

the value in  THRESH_INACT register ?
THRESH_INACT = Threshold Value [g] × Scale Factor [LSB per g]

what's the threshold value and what's the scale factor ?

FantomT

Scale factor from Table 1:
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Scale Factor at XOUT, YOUT, ZOUT
2 g range 1000 LSB/g
4 g range 500 LSB/g
8 g range 250 LSB/g
Consequently,
 if scale is 2g: THRESH_INACT = Threshold Value [g] × Scale Factor [LSB per g] = 0.6 (600 mg) x 1000 = 600;
 if scale is 4g: THRESH_INACT = Threshold Value [g] × Scale Factor [LSB per g] = 0.6 (600 mg) x   500 = 300;
 if scale is 6g: THRESH_INACT = Threshold Value [g] × Scale Factor [LSB per g] = 0.6 (600 mg) x   250 = 150;

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