SGS Thomson Microelectronics LIS244ALHTR, LIS244ALH Datasheet
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
■ High shock survivability ( 10000 g )
®
compliant
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.
LGA16
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.
(4x4x1.5mm)
Table 1. Device summary
Order code Temp range [° C] Package Packing
LIS244ALH -40 to +85 LGA-16 Tray
LIS244ALHTR -40 to +85 LGA-16 Tape and reel
February 2008 Rev 2 1/16
www.st.com
16
Content LIS244ALH
Content
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 7
2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
2.4 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
3.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
4.2 Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
5 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
6 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
2/16
LIS244ALH List of figures
List of figures
Figure 1. Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 2. Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Figure 3. LIS244ALH electrical connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Figure 4. Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Figure 5. LGA16: mechanical data and package dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3/16
List of tables LIS244ALH
List of tables
Table 1. Device summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Table 2. Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Table 3. Mechanical characteristics @ Vdd =3.3 V, T = 25 °C unless otherwise noted. . . . . . . . . . . 7
Table 4. Electrical characteristics @ Vdd =3.3 V, T = 25 °C unless otherwise noted. . . . . . . . . . . . . 8
Table 5. Absolute maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Table 6. Filter capacitor selection, C
Table 7. Document revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
(x,y) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
load
4/16
LIS244ALH Block diagram and pin description
1 Block diagram and pin description
1.1 Block diagram
Figure 1. Block diagram
X+
Y+
a
Y-
X-
SELF TEST
1.2 Pin description
Figure 2. Pin connection
MUX
REFERENCE
CHARGE
AMPLIFIER
DEMUX
TRIMMING CIRCUIT
S/H
S/H
Routx
Routy
CLOCK
VoutX
VoutY
1
X
(TOP VIEW)
DIRECTIONS OF THE
DETECTABLE
ACCELERATIONS
Vdd
NC
13 16
VoutX
12
NC
VoutY
Y
NC
8
NC
Res
NC
5
GNDNCPD
1
FS
ST
NC
49
Res
(BOTTOM VIEW)
5/16
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