E-LIS3L02AS5TR 查看數據表（PDF） - STMicroelectronics

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E-LIS3L02AS5TR

MEMS INERTIAL SENSOR: 3-axis - ±2g/6g LINEAR ACCELEROMETER

STMicroelectronics 

4 Application hints

4 Application hints

Figure 3. LIS3L02AS5 Electrical Connection

LIS3L02AS5

Vdd

10µF 100nF

GND GND

GND

ST

LIS3L02AS5

(top view)

GND

DIRECTION OF THE

DETECTABLE

ACCELERATIONS

X

13

Y

PD

FS

t(s) Cload z

duc Cload x

Pro Cload y

Optional

Vout Z

Optional

Vout X

Optional

Vout Y

1

Z

olete Digital signals

bs Power supply decoupling capacitors (100nF ceramic or polyester + 10µF Aluminum) should be

O 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

t(s capacitors. The re-commended frequency range spans from DC up to 1.5 KHz. In particular,

c capacitors must be added at output pins to implement low-pass filtering for antialiasing and

u noise reduction. The equation for the cut-off frequency (ft) of the external filters is:

Prod ft = 2----π----⋅------R----o---u----t---⋅----1-C-----l-o---a----d---(--x---,---y--,---z----)

te 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:

bsole ft

=

----------1---.--4---5----µ---F-----------

Cload(x, y, z)

[H

z]

O 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 320pF for

Cload(x, y, z) is required in any case.

10/14

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