LIS344ALH STMicroelectronics, LIS344ALH Datasheet - Page 12

• Manufacturer Part Number: LIS344ALH
• Description: Board Mount Accelerometers MEMS Inertial High Pef 3-Axis
• Manufacturer: STMicroelectronics

Specifications of LIS344ALH

• Sensing Axis: X, Y, Z
• Acceleration: 2 g, 6 g
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.4 V
• Supply Current: 680 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Shutdown: Yes
• Sensitivity: 500 mV/g, 15000 mV/g
• Package / Case: LGA-16
• Output Type: Analog - Voltage
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

Application hints
4
12/19
Application hints
Figure 3.
Power supply decoupling capacitors (100 nF ceramic or polyester + 10
should be placed as near as possible to the device (common design practice).
The LIS344ALH allows to band limit VoutX, VoutY and VoutZ through the use of external
capacitors. The recommended frequency range spans from DC up to 1.8 kHz. In particular,
capacitors are added at output VoutX, VoutY, VoutZ pins to implement low-pass filtering for
antialiasing and noise reduction. The equation for the cut-off frequency (f
filters is in this case:
Taking into account that the internal filtering resistor (R
110 KΩ , the equation for the external filter cut-off frequency may be simplified as follows:
The tolerance of the internal resistor can vary typically of
110 KΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 1 nF for
C
load
FS
ST
(x, y, z) is required.
Digital signals
1
2
3
4
LIS344ALH electrical connection
16
LIS344ALH
5
(top view)
GND
15
6
14
7
GND
13
8
100nF
f
t
12
11
10
9
=
Cload Z
Cload X
Cload Y
------------------------------------------------------------------------ -
2π
GND
⋅
f
t
10µF
R
=
out
-------------------------------------- - Hz
C
load
⋅
1.45µF
Vdd
C
Optional
Optional
Optional
1
(
load
x y z
,
(
,
x y z
,
out
)
Vout x
Vout y
Vout z
[
,
) has a nominal value equal to
±
20% within its nominal value of
)
]
(TOP VIEW)
DIRECTIONS OF THE
DETECTABLE
ACCELERATIONS
X
µ
1
F Aluminum)
t
) of the external
Pin 1 indicator
Z
LIS344ALH
Y