LIS302SG STMicroelectronics, LIS302SG Datasheet - Page 12

• Manufacturer Part Number: LIS302SG
• Description: Board Mount Accelerometers MEMS MOTION SENSOR 3 AXIS +/-2g Piccolo
• Manufacturer: STMicroelectronics

Specifications of LIS302SG

• Sensing Axis: X, Y, Z
• Acceleration: 2 g
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 3 V
• Supply Current: 0.65 mA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Shutdown: Yes
• Sensitivity: 145 mV/g
• Package / Case: LGA-14
• 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 µF Aluminum)
should be placed as near as possible to the device (common design practice).
The LIS302SG 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. Capacitors
must be added at output pins to implement low-pass filtering for antialiasing and noise
reduction, even if the only multiplexed output (Vout) is used. The equation for the cut-off
frequency ( f
Taking into account that the internal filtering resistor (R
32 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 ±20% within its nominal value of
32 kΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5 nF for
C
An external capacitor can be added to the Vout pin. Values below 10 pF are recommended.
load
Vdd
S0
S1
ST
PD
(x, y, z) is required in any case.
6
1
Analog signals
Digital signals
t
LIS302SG electrical connection
) of the external filters is:
LIS302SG
(top view)
f
13
t
Cload y
Cload x
8
=
Cload z
Cloadmux
GND
------------------------------------------------------------------------ -
2π
f
⋅
t
Vdd
=
Aux In
R
GND
100nF
out
-------------------------------------- - Hz
C
load
Optional
Optional
⋅
Optional
5µF
C
10µF
1
(
GND
Optional
x y z
load
,
,
Vout Y
Vout X
(
x y z
,
)
Vout Z
out
[
Vout
,
) has a nominal value equal to
]
)
X
Y
DIRECTIONS OF
DETECTABLE
ACCELERATIONS
Z
1
Pin 1 indicator
LIS302SG