ST LIS352AX User Manual

3-axis ±2 g absolute analog-output "piccolo" accelerometer

Features

■ Absolute 0-g level and sensitivity

■ Excellent stability over temperature

■ 3 acceleration channels plus multiplexed

analog output

■ 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 6)

LIS352AX

MEMS inertial sensor:

LGA-14

The LIS352AX 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.

(3x5x0.9mm)

±2 g and is

Applications

■ Free-fall detection for data protection

■ Tilting applications

■ Mobile and battery-operated terminals

■ Gaming and virtual reality input devices

■ Anti-theft systems and Inertial navigation

Description

The LIS352AX is a new small size, low-power 3­axis linear accelerometer that includes a sensing
element and an IC interface capable of providing
an absolute analog signal to the external world.

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.

Table 1. Device summary

Order code Temperature range, ° CPackage Packing

The self-test capability allows the user to check
the functioning of the system.

An embedded multiplexer allows the redirection of
the analog outputs onto a single pin for operation
with a single-channel A/D converter.

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.

The LIS352AX 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.

LIS352AX -40°C to +85°C LGA-14 Tray

LIS352AXTR -40°C to +85°C LGA-14 Tape and reel

February 2010 Doc ID 15530 Rev 2 1/15

www.st.com

15

Contents LIS352AX

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

3.1 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.2 Sensitivity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.3 Zero-g level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.4 Self-test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

3.5 Output impedance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

4 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.2 IC interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

5 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

5.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5.2 Output response vs. orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

6 Package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

2/15 Doc ID 15530 Rev 2

LIS352AX Block diagram and pin description

1 Block diagram and pin description

Figure 1. Block diagram

a

SELF-TEST

X+

Y+
Z+

MUX

Z­Y­X-

REFERENCE

CHARGE

AMPLIFIER

TRIMMING CIRCUIT

DEMUX

Routx

S/H

Routy

S/H

Routz

S/H

CLOCK

Aux_in

Voutx

Vouty

Voutz

Vout

MUX

S1 S0

AM06049v1

1.1 Pin connections and description

Figure 2. Pin connection

Z

X

Y

(TOP VIEW)

DIRECTIONS OF

DETECTABLE

ACCELERATIONS

1

Vdd

Aux_in

Vout

GND

Voutz

Vouty

Reserved

13

8

1

6

Voutx

(BOTTOM VIEW)

NC

Reserved

S0

S1

ST

PD

AM06050v1

Doc ID 15530 Rev 2 3/15

Block diagram and pin description LIS352AX

Table 2. Pin description

Pin # Pin Name Function

1 NC Internally not connected

2 Reserved Connect to Vdd

3 S0 Mux selector 0 (connect to Vdd or to GND)

4 S1 Mux selector 1 (connect to Vdd or to GND)

5 ST Self-test (logic 0: normal mode; logic 1: self-test)

6 PD Power-down (logic 0: normal mode; logic 1: power-down mode)

7 Voutx Output voltage X channel

8 Vouty Output voltage Y channel

9 Voutz Output voltage Z channel

10 GND 0 V supply

11 Vout Multiplexer output

12 Aux_in Auxiliary input

13 Vdd Power supply

14 Reserved Connect to Vdd

4/15 Doc ID 15530 Rev 2

LIS352AX Mechanical and electrical specifications

z

2 Mechanical and electrical specifications

2.1 Mechanical characteristics

@ Vdd=3.3 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 ±0.3 mg/°C

Best fit straight line ±0.5 % FS

Vdd=3.3 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

-Vout

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

(Vst=Logic0)

LOAD

), with C

LOAD

>2.5nF

H

a. The product is factory calibrated at 3.3 V. The operational power supply range is specified in Table 4.

Doc ID 15530 Rev 2 5/15