LIS2L02AL_06 STMICROELECTRONICS [STMicroelectronics], LIS2L02AL_06 Datasheet - Page 10

• Manufacturer Part Number: LIS2L02AL_06
• Description: MEMS INERTIAL SENSOR:2-axis - +/-2g ultracompact linear accelerometer
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

Application hints
4
10/17
Application hints
Figure 3.
Power supply decoupling capacitors (100nF ceramic or polyester + 10µF Aluminum) should
be placed as near as possible to the device (common design practice).
The LIS2L02AL allows to band limit Voutx and Vouty through the use of external capacitors.
The re-commended frequency range spans from DC up to 2.0KHz. 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
110kΩ, 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 1nF for
C
Table 5.
.
load
10µF
GND
(x, y) is required in any case.
100nF
GND
GND
ST
LIS2L02AL Electrical connection
Filter capacitor selection, C
Cut-off frequency
Vdd
Digital signals
100 Hz
200 Hz
500 Hz
10 Hz
20 Hz
50 Hz
1 Hz
LIS2L02AL
(top view)
f
t
=
f t
------------------------------------------------------------- -
2π R
=
------------------------------ - Hz
C
⋅
load
Cload x
1.45µF
Cload y
load
out
(
x y ,
⋅
(x,y)
1
C
load
)
t
[
) of the external filters is:
Optional
out
Optional
(
]
x y ,
) has a nominal value equal to
±
)
20% within its nominal value of
Vout X
Vout Y
Capacitor value
1500 nF
150 nF
6.8 nF
68 nF
30 nF
15 nF
3 nF
Y
X
DIRECTION OF THE
DETECTABLE
ACCELERATIONS
1
LIS2L02AL