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PDF LIS244AL Data sheet ( Hoja de datos )
| Número de pieza | LIS244AL | |
| Descripción | MEMS motion sensor | |
| Fabricantes | STMicroelectronics | |
| Logotipo |  |
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LIS244AL
MEMS motion sensor:
2-axis - ±2g ultracompact linear accelerometer
Features
■ Single voltage supply operation
■ ± 2g full-scale
■ Output voltage, offset and sensitivity are
ratiometric to the supply voltage
■ Factory trimmed device sensitivity and offset
■ Embedded self test
■ ECOPACK lead-free compliant
■ High shock survivability (10000g)
Description
The LIS244AL is an ultra compact consumer low-
power two-axis linear accelerometer that includes
a sensing element and an IC interface able to take
the information from the sensing element and to
provide an analog signal to the external world.
The sensing element, capable of detecting the
acceleration, is manufactured using a dedicated
process developed by ST to produce inertial
sensors and actuators in silicon. The IC interface
is manufactured using a CMOS process that
allows high level of integration to design a
dedicated circuit which is trimmed to better match
the sensing element characteristics.
LGA 16 (4x4x1.5mm)
The LIS244AL is capable of measuring
accelerations over a maximum bandwidth of
2.0kHz. The device bandwidth may be reduced by
using external capacitances. A self-test capability
allows the user to check the functioning of the
system.
The LIS244AL is available in Land Grid Array
package (LGA) and it is guarantee to operate over
an extended temperature range of -40°C to
+85°C.
The LIS244AL belongs to a family of products
suitable for a variety of applications:
– Mobile terminals
– Gaming and Virtual Reality input devices
– Antitheft systems and Inertial Navigation
– Appliance and Robotics.
Table 1. Device summary
Order codes
Temp range, ° C
LIS244AL
-40°C to +85°C
LIS244ALTR
-40°C to +85°C
Package
LGA-16
LGA-16
Note:
Tape & Reel parts are compliant to International Standard EIA-481.
Packing
Tray
Tape & Reel
June 2007
Rev 1
1/15
www.st.com
15
1 page  
LIS244AL
Mechanical and electrical specifications
2 Mechanical and electrical specifications
2.1
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Mechanical characteristics
(Temperature range -40°C to +85°C). All the parameters are specified @ Vdd =3.0V,
T = 25°C unless otherwise noted
Table 3.
Symbol
Mechanical characteristics(1)
Parameter
Test condition
Min.
Typ.(2)
Max.
Unit
Ar Acceleration range(3)
±2 g
So Sensitivity(5)
0.140*Vdd -
10%
0.140*Vdd
0.140*Vdd+
10%
V/g
SoDr
Voff
Sensitivity change vs
temperature
Zero-g level(4)
Delta from +25°C
T = 25°C
Vdd/2-15%
0.01
Vdd/2
Vdd/2+15%
%/°C
V
OffDr
Zero-g level change vs
temperature
Delta from +25°C
NL Non linearity(5)
Best fit straight line
CrossAx Cross-axis(6)
1 mg/°C
±0.5 % FS
±2 %
An
Acceleration noise
density
Vdd=3.0V
220 µg/ Hz
T = 25°C
Vdd=3.0V
Vt
Self test output voltage X axis
change(7),
T = 25°C
Vdd=3.0V
Y axis
105 mV
105 mV
Fres
Sensing element
resonant frequency(8)
X,Yaxis
4.0
kHz
Top
Operating temperature
range
-40 +85 °C
Wh Product weight
0.040
gram
1. The product is factory calibrated at 3.0V. The operational power supply range is from 2.4V to 3.6V. Voff, So and Vt
parameters will vary with supply voltage
2. Typical specifications are not guaranteed
3. Guaranteed by wafer level test and measurement of initial offset and sensitivity
4. Zero-g level and sensitivity are essentially ratiometric to supply voltage at the calibration level ±8%
5. Guaranteed by design
6. Contribution to the measuring output of an inclination/acceleration along any perpendicular axis
7. “Self test output voltage change” is defined as Vout(Vst=Logic1)-Vout(Vst=Logic0)
8. Minimum resonance frequency Fres=4.0kHz. Sensor bandwidth=1/(2*π*32kΩ*Cload)
5/15
5 Page 
LIS244AL
Application hints
The tolerance of the internal resistor can vary typically of ±20% within its nominal value of
32kΩ; thus the cut-off frequency will vary accordingly. A minimum capacitance of 2.5nF for
Cload(x, y) is required.
www.datasheet4u.com Table 6.
Filter Capacitor Selection, Cload (x,y),
Cut-off frequency
1 Hz
10 Hz
20 Hz
50 Hz
100 Hz
200 Hz
500 Hz
Capacitor value
5 µF
0.5µF
250nF
100nF
50nF
25nF
10nF
4.1
4.2
Soldering information
The LGA package is compliant with the ECOPACK, RoHs and “Green” standard.
Pin1 indicator is electrically connected to pin 1. Leave pin 1 indicator unconnected during
soldering.
Output Response vs. orientation
Figure 4.
Output response vs. orientation
X=1.50V (0g)
Y=1.83V (+1g)
X=1.83V (+1g)
Y=1.50V (0g)
TOP VIEW
X=1.17V (-1g)
Y=1.50V (0g)
Top
X=1.50V (0g)
Y=1.50V (0g)
Bottom
Top
X=1.50V (0g)
Y=1.50V (0g)
Bottom
X=1.50V (0g)
Y=1.17V (-1g)
Earth’s Surface
Figure 4 refers to LIS244AL powered at 3.0V.
11/15
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| PDF Descargar | [ Datasheet LIS244AL.PDF ] | |
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