參數(shù)資料
型號(hào): LIS244ALTR
廠商: 意法半導(dǎo)體
英文描述: MEMS motion sensor:2-axis - 【2g ultracompact linear accelerometer
中文描述: MEMS運(yùn)動(dòng)傳感器:2 -軸- 【第二代超小型線性加速度計(jì)
文件頁(yè)數(shù): 10/15頁(yè)
文件大小: 149K
代理商: LIS244ALTR
Application hints
LIS244AL
10/15
4
Application hints
Figure 3.
LIS244AL Electrical connection
Power supply decoupling capacitors (100nF ceramic or polyester + 10
μ
F Aluminum) should
be placed as near as possible to the device (common design practice).
The LIS244AL allows to band limit Voutx, Vouty through the use of external capacitors. The
recommended frequency range spans from DC up to 2.0kHz. In particular, capacitors are
added at output Voutx, Vouty pins to implement low-pass filtering for antialiasing and noise
reduction. The equation for the cut-off frequency (f
t
) of the external filters is in this case:
Equation 1
Taking into account that the internal filtering resistor (R
out
) has a nominal value equal to
32k
, the equation for the external filter cut-off frequency may be simplified as follows:
Equation 2
Digital signals
LIS244AL
(top view)
(TOP VIEW)
DIRECTION OF THE
DETECTABLE
ACCELERATIONS
Y
1
X
ST
GND
1
4
9
12
Vdd
GND
10
μ
F
GND
100nF
Vout y
Optional
Cload y
Vout x
Cload x
Optional
5
16
2
3
6
7
8
10
11
15
14
13
Pin 1 indicator
f
t
2
π
R
out
C
load
x y
(
)
----------------------------------------------------------------
=
f
t
C
load
x y
-------------------------
Hz
[
]
=
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