KX022-1020 Datasheet, PDF (62/75 Pages) List of Unclassifed Manufacturers – Accelerometer Specifications

± 2g / 4g / 8g Tri-axis Digital
Accelerometer Specifications
PART NUMBER:
KX022-1020
Rev. 11.0
10-Sep-15
Directional Tap Detection Feature Description
The Directional Tap Detection feature of the KX022 recognizes single and double tap inputs and reports the
acceleration axis and direction that each tap occurred. Eight performance parameters, as well as a user-
selectable ODR are used to configure the KX022 for a desired tap detection response.
Performance Index
The Directional Tap^TM detection algorithm uses low and high thresholds to help determine when a tap event
has occurred. A tap event is detected when the previously described jerk summation exceeds the low
threshold (TTL) for more than the tap detection low limit, but less than the tap detection high limit as contained
in FTD. Samples that exceed the high limit (TTH) will be ignored. Figure 11 shows an example of a single tap
event meeting the performance index criteria.
Calculated Performance Index
180
PI
160
: Sampled Data
140
120
100
80
60
40
TTL
20
0
3.14 3.15 3.16 3.17 3.18 3.19
3.2
3.21
time(sec)
Figure 11: Jerk Summation vs Threshold
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