LIS3L02AL データシートの表示（PDF） - STMicroelectronics
部品番号
コンポーネント説明
一致するリスト
LIS3L02AL Datasheet PDF : 17 Pages
| |||
Application hints
4
Application hints
LIS3L02AL
Figure 3. LIS3L02AL electrical connection
Vdd
10µF 100nF
GND GND
ST
GND
LIS3L02AL
(top view)
Cload x
Cload y
Digital signals
Cload z
Z
X
Optional
Vout X
1
Optional
Y
Vout Y
Optional
Vout Z
DIRECTION OF THE
DETECTABLE
ACCELERATIONS
Power supply decoupling capacitors (100nF ceramic or polyester + 10µF Aluminum) should
be placed as near as possible to the device (common design practice).
The LIS3L02AL 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 (ft) of the external filters is:
ft
=
---------------------------------1----------------------------------
2π ⋅ Rout ⋅ Cload(x, y, z)
Taking in account that the internal filtering resistor (Rout) has a nominal value equal to
110kΩ, the equation for the external filter cut-off frequency may be simplified as follows:
ft = C-----l--o---1a---.-d-4---(5--x--µ-,--F-y---,----z---)[Hz]
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 1nF for
Cload(x, y, z) is required in any case.
.
Table 5.
Filter capacitor selection, Cload (x,y,z)
Cut-off frequency
Capacitor value
1 Hz
10 Hz
20 Hz
50 Hz
100 Hz
200 Hz
500 Hz
1500 nF
150 nF
68 nF
30 nF
15 nF
6.8 nF
3 nF
10/17
Share Link: 