Application hints

LIS244AL

10/15

4

Application hints

Figure 3.

LIS244AL Electrical connection

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

µF Aluminum) should

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

The LIS244AL allows to band limit Voutx, Vouty through the use of external capacitors. The

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

added at output Voutx, Vouty pins to implement low-pass filtering for antialiasing and noise

Equation 1

32k

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

Equation 2

Digital signals

LIS244AL

(top view)

(TOP VIEW)

DIRECTION OF THE

DETECTABLE

ACCELERATIONS

Y

1

X

ST

GND

1

4

9

12

Vdd

GND

GND

100nF

10

Vout y

Optional

Cload y

Vout x

Cload x

Optional

5

16

2

3

67

8

10

11

15

14

13

Pin 1 indicator

f

t

1

2

π R

out

C

,

()

⋅⋅

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

=

f

t

5

µF

C

,

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

[]

=