LIS344ALTR STMicroelectronics, LIS344ALTR Datasheet - Page 11

• Manufacturer Part Number: LIS344ALTR
• Description: ACCELEROMETER TRPL AXIS 16-LGA
• Manufacturer: STMicroelectronics

Specifications of LIS344ALTR

• Axis: X, Y, Z
• Acceleration Range: ±3.5g
• Sensitivity: 0.100 x Vdd = V/g
• Voltage - Supply: 2.7 V ~ 3.3 V
• Output Type: Analog
• Bandwidth: 2kHz
• Interface: IC
• Mounting Type: Surface Mount
• Package / Case: 16-LGA
• Sensing Axis: X, Y, Z
• Acceleration: 3.5 g
• Supply Voltage (max): 3.3 V
• Supply Voltage (min): 2.7 V
• Supply Current: 0.69 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• For Use With: 497-8231 - EVALUATION BOARD FOR THE LIS344A497-8201 - BOARD ADAPTER LIS344AL DIL24497-8200 - BOARD DEMO LIS344AL497-8199 - BOARD DEMO LIS344ALH
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

LIS344AL
4
Application hints
Figure 3.
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
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
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
kΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5 nF for
C
load
GND
ST
(x, y, z) is required.
Digital signals
LIS344AL electrical connection
1
2
3
4
16
5
LIS344AL
(top view)
15
6
14
7
13
GND
8
f
t
100nF
=
12
11
10
9
------------------------------------------------------------------------ -
2π
Cload Z
Cload X
Cload Y
⋅
f
GND
t
R
=
10µF
out
-------------------------------------- - Hz
C
load
⋅
C
1
5µF
Optional
Vdd
Optional
Optional
(
load
x y z
,
(
,
x y z
,
out
)
[
±
,
Vout y
Vout x
Vout z
) has a nominal value equal to 32
20% within its nominal value of 32
)
]
(TOP VIEW)
DIRECTIONS OF THE
DETECTABLE
ACCELERATIONS
X
t
Application hints
) of the external
1
Pin 1 indicator
Z
Y
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