LIS344AL

Application hints

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4

Application hints

Figure 3.

LIS344AL electrical connection

Power supply decoupling capacitors (100 nF ceramic or polyester + 10

µF Aluminum)

should be placed as near as possible to the device (common design practice).

The LIS344AL allows to band limit VoutX, VoutY and VoutZ through the use of external

capacitors. The recommended frequency range spans from DC up to 2.0 kHz. In particular,

capacitors are added at output VoutX, VoutY, VoutZ pins to implement low-pass filtering for

filters is in this case:

k

Ω, the equation for the external filter cut-off frequency may be simplified as follows:

The tolerance of the internal resistor can vary typically of

k

Ω; thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5 nF for

Y

LIS344AL

(top view)

1

1

49

12

Optional

Cload Y

Cload X

Optional

Cload Z

Optional

5

16

2

3

67

8

10

11

15

14

13

Pin 1 indicator

ST

Vdd

GND

GND

100nF

10µF

Digital signals

(TOP VIEW)

DIRECTIONS OF THE

DETECTABLE

ACCELERATIONS

X

Z

GND

Vout y

Vout x

Vout z

f

t

1

2

π R

out

C

z

,,

()

⋅⋅

-------------------------------------------------------------------------

=

f

t

5

µF

C

z

,,

()

--------------------------------------- Hz

[]

=