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LIS2DH12 データシート(PDF) 17 Page - STMicroelectronics

部品番号 LIS2DH12
部品情報  Free-fall detection
PDF  53 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LIS2DH12 データシート(HTML) 17 Page - STMicroelectronics

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LIS2DH12
Terminology and functionality
53
The turn-on time to transition to another operating mode is given in Table 11.
3.2.2
Self-test
The self-test allows the user to check the sensor functionality without moving it. When the
self-test is enabled, an actuation force is applied to the sensor, simulating a definite input
acceleration. In this case the sensor outputs will exhibit a change in their DC levels which
are related to the selected full scale through the device sensitivity. When the self-test is
activated, the device output level is given by the algebraic sum of the signals produced by
the acceleration acting on the sensor and by the electrostatic test-force. If the output signals
change within the amplitude specified inside Table 4, then the sensor is working properly
and the parameters of the interface chip are within the defined specifications.
Table 11. Turn-on time for operating mode transition
Operating mode change
Turn-on time
[ms]
12-bit mode to 8-bit mode
1/ODR
12-bit mode to 10-bit mode
1/ODR
10-bit mode to 8-bit mode
1/ODR
10-bit mode to 12-bit mode
7/ODR
8-bit mode to 10-bit mode
1/ODR
8-bit mode to 12-bit mode
7/ODR
Table 12. Current consumption of operating modes
Operating mode [Hz]
Low-power mode
(8-bit data output)
[μA]
Normal mode
(10-bit data output)
[μA]
High resolution
(12-bit data output)
[μA]
12
2
2
10
3
4
4
25
4
6
6
50
6
11
11
100
10
20
20
200
18
38
38
400
36
73
73
1344
--
185
185
1620
100
--
--
5376
185
--
--



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