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PDF LIS352AX Data sheet ( Hoja de datos )
| Número de pieza | LIS352AX | |
| Descripción | Accelerometers | |
| Fabricantes | ST Microelectronics | |
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LIS352AX
MEMS inertial sensor
3-axis - ±2g absolute analog output accelerometer
Preliminary Data
Features
■ Absolute 0-g level and sensitivity
■ Very high stability over temperature
■ 3 acceleration channels plus multiplexed
analog output
■ Factory trimmed device sensitivity and
0-g level
■ Power-down mode
■ Embedded self test
■ 10000g high shock survivability
■ ECOPACK® RoHS and “Green” compliant
(see Section 5)
Applications
■ Free-fall detection for data protection
■ Mobile and battery operated terminals
■ Gaming and virtual reality input devices
■ Antitheft systems and inertial navigation
Description
The LIS352AX is the new small size, low-power
three-axis linear accelerometer that includes a
sensing element and an IC interface able to
provide an absolute analog signal to the external
world.
The IC interface is manufactured using a CMOS
process that allows high level of integration to
LGA14 (3x5x0.9mm)
design a dedicated circuit which is trimmed to
better match the sensing element characteristics.
The LIS352AX has a full scale of ±2g and it is
capable of measuring accelerations over a
maximum bandwidth of 2.0 kHz. The device
bandwidth may be reduced by using external
capacitances.
The self-test capability allows the user to check
the functioning of the system.
An embedded multiplexer allows to redirect the
analog outputs onto a single pin for operation with
a single channel A/D converter.
ST is already in the field with several hundreds
million sensors with excellent acceptance from
the market in terms of quality, reliability and
performance.
The LIS352AX is provided in plastic land grid
array (LGA) package.
Several years ago ST pioneered successfully the
usage of this package for accelerometers. Today
ST has the widest manufacturing capability and
strongest expertise in the world for production of
sensor in plastic LGA package.
Table 1. Device summary
Order codes
Temperature range, ° C
LIS352AX
-40°C to +85°C
LIS352AXTR
-40°C to +85°C
Package
LGA-14
LGA-14
Packing
Tray
Tape and reel (16mm, pitch 0.8mm)
March 2009
Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/14
www.st.com
14
1 page  
LIS352AX
Mechanical and electrical specifications
2 Mechanical and electrical specifications
2.1 Mechanical characteristics
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@ T = 25 °C unless otherwise noted
Table 3. Mechanical characteristics (1)
Symbol
Parameter
Test condition
Ar Acceleration range(3)
So Sensitivity(4)
SoDr
Voff
Sensitivity change vs.
Temperature
Delta from +25°C
Zero-g level(4)
T = 25°C
Min.
0.363 - 5%
1.25 - 6%
Typ.(2)
±2.0
0.363
±0.01
1.25
Max.
0.363 + 5%
1.25 + 6%
OffDr
Zero-g level change
Vs Temperature
NL Non linearity(5)
CrossAx Cross-axis(6)
An
Acceleration noise
density
Delta from +25°C
Best fit straight line
Vdd=3.3V
T = 25°C
X axis
±0.3
±0.5
±2
100
+210
Vt
Self test output
voltage change(7)
T = 25°C
Y axis
+210
Fres
Top
Wh
T = 25°C
Z axis
Sensing element
resonant frequency(8)
X, Y, Z axis
Operating
temperature range
Product Weight
+290
2.0
-40 +85
30
1. Product is factory calibrated at 3.3 V
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 not ratiometric to supply voltage
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=2.0 kHz. Sensor bandwidth=1/(2*π*32 kΩ*Cload), with Cload>2.5 nF
Unit
g
V/g
%/°C
V
mg/°C
% FS
%
µg/ Hz
mV
mV
mV
kHz
°C
mgram
5/14
5 Page 
LIS352AX
Application hints
An external capacitor can be added to the Vout pin. Values below 10 pF are recommended.
Table 6.
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Filter capacitor selection, Cload (x,y,z)
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
Table 7. MUX I/O table
S1 pin
0
0
1
1
S0 pin
0
1
0
1
MUX status
Vout=Voutx
Vout=Vouty
Vout=Voutz
Vout=Aux_in
4.1
4.2
Soldering information
The LGA package is compliant with the ECOPACK®, RoHs and “Green” standard.
It is qualified for soldering heat resistance according to JEDEC J-STD-020C.
Leave “Pin 1 Indicator” unconnected during soldering.
Land pattern and soldering recommendations are available at www.st.com/.
Output response vs. orientation
Figure 4.
Output response vs. orientation
X=0.89V (-1g)
Y=1.25V (0g)
Z=1.25V (0g)
X=1.25V (0g)
Y=1.61V (+1g)
Z=1.25V (0g)
TOP VIEW
X=1.61V (+1g)
Y=1.25V (0g)
Z=1.25V (0g)
X=1.25V (0g)
Y=0.89V (-1g)
Z=1.25V (0g)
Bottom
X=1.25V (0g)
Y=1.25V (0g)
Top Z=0.89V (-1g)
Top
X=1.25V (0g)
Y=1.25V (0g)
Bottom Z=1.61V (+1g)
Earth’s Surface
11/14
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| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet LIS352AX.PDF ] | |
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