LIS332AX
MEMS inertial sensor:
3-axis ±2 g absolute analog-output ultracompact accelerometer
Features
■ Single voltage supply operation
■ ±2 g full-scale
■ Excellent stability over temperature
■ Absolute 0-g level and sensitivity
■ Factory-trimmed device sensitivity and
0-g level
■ Power-down mode
■ Embedded self-test
■ 10000 g high shock survivability
■ ECOPACK® RoHS and “Green” compliant
(see Section 7)
Applications
■ Tilting applications
■ Free-fall detection
■ Gaming
■ Anti-theft systems
■ Inertial navigation and motion tracking
LGA-16
The IC interface is manufactured using a CMOS
process that allows a high level of integration to
design a dedicated circuit trimmed to better match
the sensing element characteristics.
The LIS332AX has a full-scale of
capable of measuring accelerations over a
maximum bandwidth of 2.0 kHz. The device
bandwidth may be reduced by using external
capacitors. The self-test capability allows the user
to check the functioning of the system.
ST is already in the field with several hundred
million sensors which have received excellent
acceptance from the market in terms of quality,
reliability and performance.
(3x3x1.0mm)
±2 g, and is
Description
The LIS332AX is an ultracompact low-power 3axis linear accelerometer that includes a sensing
element and an IC interface to provide an analog
signal to the external world.
The sensing element, capable of detecting the
The LIS332AX is provided in a plastic land grid
array (LGA) package.
Several years ago ST successfully pioneered the
use of this package for accelerometers. Today, ST
has the widest manufacturing capability and
strongest expertise in the world for production of
sensors in plastic LGA packages.
acceleration, is manufactured using a dedicated
process developed by ST to produce inertial
sensors and actuators in silicon.
Table 1. Device summary
February 2010 Doc ID 16932 Rev 1 1/14
Part number Temperature range, ° C Package Packing
LIS332AX -40°C to +85°C LGA-16 Tray
LIS332AXTR -40°C to +85°C LGA-16 Tape and reel
www.st.com
14
Contents LIS332AX
Contents
1 Block diagram and pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1 Pin connections and description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Mechanical and electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1 Mechanical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.2 Zero-g level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.3 Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.4 Output impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
5 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
5.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
6 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6.2 Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
7 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
8 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
2/14 Doc ID 16932 Rev 1
LIS332AX Block diagram and pin description
1 Block diagram and pin description
Figure 1. Block diagram
8
#(!2'%
!-0,)&)%
42)--).'#)2#5)4
2
$%-58
A
3%,&4%34
9
:
:
9
8
2%&%2%.#%
-58
1.1 Pin connections and description
Figure 2. Pin connection
3(
3(
3
#,/#+
2OUTX
2OUTY
2OUTZ
(
0/7%2$/7.
.#
RES
6D
D
X
6OUT
Y
6OUT
Z
6OUT
0$
!-V
8
$IRECTIO
:
4OPVIEW
NOFTHEDETECTABLE
ACCELERATIO
NS
9
6OUTX
.#
6OUTY
.#
6OUTZ
.#
.#
'.
.#
RES
.#
34
0$
$
"OTTOMVIEW
!-V
Doc ID 16932 Rev 1 3/14
Block diagram and pin description LIS332AX
Table 2. Pin description
Pin # Pin name Function
1 NC Internally not connected
2 res Connect to Vdd
3 NC Not connected
4 ST Self-test (logic 0: normal mode; logic 1: self-test mode)
5 PD Power-down (logic 0: normal mode; logic 1: power-down mode)
6 GND 0 V supply
7 NC Not connected
8 NC Not connected
9 Voutz Output voltage Z channel
10 NC Not connected
11 Vouty Output voltage Y channel
12 NC Not connected
13 Voutx Output voltage X channel
14 NC Not connected
15 res Connect to Vdd
16 Vdd Power supply
4/14 Doc ID 16932 Rev 1
LIS332AX Mechanical and electrical specifications
2 Mechanical and electrical specifications
2.1 Mechanical characteristics
@ Vdd=3 V, T=25 °C unless otherwise noted
Table 3. Mechanical characteristics
Symbol Parameter Test condition Min. Typ.
(4)
(4)
(6)
(2)
Delta from +25 °C ±0.01 %/°C
T = 25°C 1.25-3.5% 1.25 1.25+3.5% V
Delta from +25 °C ±0.2 mg/°C
Best fit straight line ±0.5 % FS
Vdd=3 V 100 µg/
T = 25 °C
X axis
T = 25 °C
Y axis
T = 25 °C
Z axis
X, Y, Z axis 2.0 kHz
(7)
(Vst=Logic1)
=2.0 kHz. Sensor bandwidth=1/(2*π*32kΩ*C
RES
Ar Acceleration range
So Sensitivity
SoDr
Sensitivity change vs.
temperature
(3)
Voff Zer o-g level
OffDr
Zero-g level change
vs. temperature
NL Non linearity
CrossAx Cross-axis
Acceleration noise
An
density
Self-test output
Vt
voltage change
Fres
Top
Sensing element
resonant frequency
Operating
temperature range
(5)
Wh Product weight 30 mgram
1. Typical specifications are not guaranteed
2. Guaranteed by wafer level test and measurement of initial offset and sensitivity
3. Zero-g level and Sensitivity are absolute to supply voltage
4. Guaranteed by design
5. Contribution to the measuring output of an inclination/acceleration along any perpendicular axis
6. “Self-test output voltage change” is defined as Vout
7. Minimum resonance frequency F
(a)
(1)
Max. Unit
±2.0 g
0.363 - 5% 0.363 0.363 + 5% V/g
±2 %
40 550 mV
40 550 mV
40 550 mV
-40 +85 °C
-Vout
(Vst=Logic0)
LOAD
), with C
LOAD
>2.5 nF
Hz
a. The product is factory calibrated at 3 V. The operational power supply range is specified in Table 4.
Doc ID 16932 Rev 1 5/14