lis3l02as5 STMicroelectronics, lis3l02as5 Datasheet - Page 10

• Manufacturer Part Number: lis3l02as5
• Description: Mems Inertial Sensor 3-axis - ??2g/6g Linear Accelerometer
• Manufacturer: STMicroelectronics

4 Application hints
4
Figure 3.
10/14
Application hints
Power supply decoupling capacitors (100nF ceramic or polyester + 10µF Aluminum) should be
placed as near as possible to the device (common design practice).
The LIS3L02AS5 allows to band limit Voutx, Vouty and Voutz through the use of external
capacitors. The re-commended 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 frequency (f
Taking in account that the internal filtering resistor (R
the equation for the external filter cut-off frequency may be simplified as follows:
The tolerance of the internal resistor can vary typically of
110kΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 320pF for
C
10µF
GND
load
LIS3L02AS5 Electrical Connection
(x, y, z) is required in any case.
100nF
GND
Vdd
ST
PD
GND
Digital signals
LIS3L02AS5
(top view)
Cload z
Cload y
Cload x
f t
=
f
t
----------------------------------------------------------------- -
2π
=
Optional
Optional
Optional
------------------------------------ - Hz
C
⋅
GND
load
R
1.45µF
out
(
x y z
Vout Z
Vout X
⋅
, ,
Vout Y
1
C
load
FS
)
out
[
) has a nominal value equal to 110kΩ ,
(
t
]
) of the external filters is:
x y z
±
, ,
20% within its nominal value of
)
Y
DIRECTION OF THE
DETECTABLE
ACCELERATIONS
1
X
Z
13
LIS3L02AS5