e-lis2l02as4tr STMicroelectronics, e-lis2l02as4tr Datasheet - Page 7

• Manufacturer Part Number: e-lis2l02as4tr
• Description: Mems Inertial Sensor 2-axis - ??2g/??6g Linear Accelerometer
• Manufacturer: STMicroelectronics

5
Figure 4. LIS2L02AS4 Electrical Connection
Power supply decoupling capacitors (100nF ceramic + 10
the device (common design practice).
The LIS2L02AS4 allows to band limit Voutx, Vouty through the use of external capacitors. The recom-
mended frequency range spans from DC up to 1.5 kHz. In particular, capacitors must be added at output
pins to implement low-pass filtering for antialiasing and noise reduction. The equation for the cut-off fre-
quency (f
Taking in account that the internal filtering resistor (R
for the external filter cut-off frequency may be simplified as follows:
The tolerance of the internal resistor can vary typically of ±20% within its nominal value of 110kΩ; thus the
cut-off frequency will vary accordingly. A minimum capacitance of 320 pF for C
case.
10µF
GND
Application hints
100nF
t
GND
) of the external filters is:
Vdd
ST
PD
GND
Digital signals
1
2
3
4
5
6
7
8
9
10
11
12
LIS2L02AS4
(top view)
Cload x
Cload y
f
t
24
23
22
21
20
19
18
17
16
15
14
13
=
f
t
--------------------------------------------------------------- -
2π
=
Optional
Optional
------------------------------ - Hz
C
⋅
load
GND
1.45µF
R
out
(
x y
out
,
⋅
Vout X
Vout Y
1
C
) has a nominal value equal to 110kΩ, the equation
)
[
load
µ
FS
F Al) should be placed as near as possible to
(
]
x y
,
)
Y
DIRECTION OF THE
DETECTABLE
ACCELERATIONS
1
X
load
(x, y) is required in any
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LIS2L02AS4
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