LIS244ALH
MEMS inertial sensor
high performance 2-axis ±2/±6g ultracompact linear accelerometer
Features
■
■
■
■
■
■
■
■
2.4 V to 3.6 V single supply operation
±2 g / ±6 g user selectable full-scale
Low power consumption
Output voltage, offset and sensitivity are
ratiometric to the supply voltage
Factory trimmed device sensitivity and offset
Embedded self test
RoHS/ECOPACK
®
compliant
High shock survivability ( 10000 g )
The LIS244ALH has a dynamically user
selectable full-scale of ±2 g / ±6 g and it is
capable of measuring accelerations over a
maximum bandwidth of 2.0 kHz for all axes. The
device bandwidth may be reduced by using
external capacitances. The self-test capability
allows the user to check the functioning of the
system.
The LIS244ALH is available in Land Grid Array
package (LGA) manufactured by ST.
It is guaranteed to operate over an extended
temperature range of -40 °C to +85 °C.
The LIS244ALH 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.
LGA16 (4x4x1.5mm)
Description
The LIS244ALH 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 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 an ST
proprietary CMOS process with high level of
integration. The dedicated circuit is trimmed to
better match the sensing element characteristics.
Table 1.
Device summary
Temp range [° C]
-40 to +85
-40 to +85
Package
LGA-16
LGA-16
Packing
Tray
Tape and reel
Order code
LIS244ALH
LIS244ALHTR
February 2008
Rev 2
1/16
www.st.com
16
Content
LIS244ALH
Content
1
Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1
1.2
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2
Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1
2.2
2.3
2.4
Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3
Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1
3.2
3.3
Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1
4.2
Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5
6
Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16
LIS244ALH
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
LIS244ALH electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
LGA16: mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3/16
List of tables
LIS244ALH
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Mechanical characteristics @ Vdd =3.3 V, T = 25 °C unless otherwise noted . . . . . . . . . . . 7
Electrical characteristics @ Vdd =3.3 V, T = 25 °C unless otherwise noted. . . . . . . . . . . . . 8
Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Filter capacitor selection, C
load
(x,y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4/16
LIS244ALH
Block diagram and pin description
1
1.1
Block diagram and pin description
Block diagram
Figure 1.
Block diagram
X+
Y+
CHARGE
AMPLIFIER
S/H
Routx
VoutX
a
Y-
X-
MUX
DEMUX
Routy
S/H
VoutY
SELF TEST
REFERENCE
TRIMMING CIRCUIT
CLOCK
1.2
Pin description
Figure 2.
Pin connection
NC
13
Vdd
NC
Res
16
1
1
VoutX
NC
VoutY
12
FS
ST
NC
X
Y
NC
9
8
5
4
Res
NC
GND
NC
PD
(TOP VIEW)
DIRECTIONS OF THE
DETECTABLE
ACCELERATIONS
(BOTTOM VIEW)
5/16
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