STMicroelectronics LIS 2 L 02 AL Service Manual

www.DataSheet4U.com

2-axis - +/-2g ULTRACOMPACT LINEAR ACCELEROMETER

Features

■ 2.4V TO 5.25V SINGLE SUPPLY

OPERATION

■ LOW POWER CONSUMPTION

■ ±2g FULL-SCALE

■ 0.3mg RESOLUTION OVER 100Hz

BANDWIDTH

■ EMBEDDED SELF TEST

■ OUTPUT VOLTAGE, OFFSET AND

SENSITIVITY RATIOMETRIC TO THE SUPPLY VOLTAGE

■ HIGH SHOCK SURVIVABILITY

■ ECO-PACK COMPLIANT

Description

The LIS2L02AL is a low-power 2-axis linear capacitive accelerometer that includes a sensing element and an IC interface able to take the information from the sensing element and to 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 a standard CMOS process that allows high level of integration

LIS2L02AL

MEMS INERTIAL SENSOR:

LGA-8

to design a dedicated circuit which is trimmed to better match the sensing element characteristics.

The LIS2L02AL has a full scale of capable of measuring accelerations over a bandwidth of 2.0 kHz for all axes. The device bandwidth may be reduced by using external capacitances. A self-test capability allows to check the mechanical and electrical signal path of the sensor.

The LIS2L02AL is available in plastic SMD package and it is guaranteed to operate over an extended temperature range of -40°C to +85°C.

The LIS2L02AL belongs to a family of products suitable for a variety of applications:

– Mobile terminals – Gaming and Virtual Reality input devices – Free-fall detection for data protection – Antitheft systems and Inertial Navigation – Appliance and Robotics.

±2g and it is

Order codes

Part number Temp range, °C Package Packing

LIS2L02AL -40°C to +85°C LGA-8 Tray

LIS2L02ALTR -40°C to +85°C LGA-8 Tape & Reel

Rev 1

September 2005 CD00068420 1/17

www.st.com

LIS2L02AL

Contents

1 Block Diagram & Pins Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.1 Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

1.2 Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

2 Mechanical and Electrical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.1 Mechanical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

2.2 Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

2.3 Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

2.4 Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

3 Functionality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.1 Sensing element . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.2 IC Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

3.3 Factory calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

4 Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

4.1 Soldering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

4.2 Output Response vs Orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.1 Mechanical Characteristics at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

5.2 Mechanical Characteristics derived from measurement in the

-40°C to +85°C temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

5.3 Electrical characteristics at 25°C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

6 Package Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

7 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

2/17 CD00068420

LIS2L02AL 1 Block Diagram & Pins Description

1 Block Diagram & Pins Description

1.1 Block diagram

Figure 1. Block Diagram

X+

Y+

Y-

X-

SELF TEST

1.2 Pin Description

Figure 2. Pin Connection

MUX

REFERENCE

CHARGE

AMPLIFIER

TRIMMING CIRCUIT

DEMUX

S/H

CLOCK

Routx

Routy

Voutx

Vouty

DIRECTION OF THE DETECTABLE ACCELERATIONS

LIS2L02AL

Vdd

Voutx

Vouty

Reserved

BOTTOM VIEW

CD00068420 3/17

GND

1 Block Diagram & Pins Description LIS2L02AL

Table 1. Pin description

Pin # Pin Name Function

1 ST Self Test (Logic 0: normal mode; Logic 1: Self-test)

2 NC Not connected

3 GND 0V supply

4 Reserved Leave unconnected

5 Reserved Leave unconnected

6 Vouty Output Voltage Y channel

7 Voutx Output Voltage X channel

8 Vdd Power supply

4/17 CD00068420

LIS2L02AL 2 Mechanical and Electrical Specifications

2 Mechanical and Electrical Specifications

2.1 Mechanical Characteristics

Table 2. Mechanical Characteristics1

(Temperature range -40°C to +85°C) All the parameters are specified @ Vdd =3.3V, T = 25°C unless otherwise noted.

Symbol Parameter Test Condition Min.

Typ.

Max. Unit

SoDr

Voff

OffDr

CrossAx

Acceleration Range

Sensitivity

Sensitivity Change Vs Temperature

Zero-g Level

Zero-g level Change Vs Temperature

Non Linearity

Cross-Axis

Acceleration Noise Density

Self test Output Voltage

Change

7,8

±1.8 ±2.0 g

Full-scale = 2g Vdd/5–10% Vdd/5 Vdd/5+10% V/g

Delta from +25°C ±0.01 %/°C

T = 25°C Vdd/2-6% Vdd/2 Vdd/2+6% V

Delta from +25°C ±0.2 mg/°C

Best fit straight line Full-scale = 2g X, Y axis

Vdd=3.3V; Full-scale = 2g

T = 25°C Vdd=3.3V Full-scale = 2g X axis

T = 25°C Vdd=3.3V Full-scale = 2g Y axis

-20 -50 -100 mV

20 50 100 mV

±0.3 ±1.5 %

±2 ±4%

µg/

Fres

To p

Wh Product Weight 0.08 gram

Sensing Element

Resonance Frequency

Operating Temperature Range

all axes 2.0 kHz

-40 +85 °C

Note: 1 The product is factory calibrated at 3.3V. The device can be powered from 2.4V to 5.25V. Voff,

So and Vt parameters will vary with supply voltage.

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 essentially ratiometric to supply voltage

5 Guaranteed by design

CD00068420 5/17

2 Mechanical and Electrical Specifications LIS2L02AL

6 Contribution to the measuring output of the inclination/acceleration along any perpendicular

axis

7 Self test “output voltage change” is defined as Vout

(Vst=Logic1)

-Vout

(Vst=Logic0)

8 Self test “output voltage change” varies cubically with supply voltage

9 Minimum resonance frequency Fres=2.0KHz. Sensor bandwidth=1/(2*

*110kΩ*Cload) with

Cload>723pF.

2.2 Electrical Characteristics

Table 3. Electrical Characteristics

(Temperature range -40°C to +85°C) All the parameters are specified @ Vdd =3.3V, T=25°C unless otherwise noted

Symbol Parameter Test Condition Min.

Vdd Supply Voltage 2.4 3.3 5.25 V

Idd Supply Current mean value 0.85 1.5 mA

Vst Self Test Input

Rout Output Impedance 80 110 140 kΩ

Cload

To p

Capacitive Load Drive

Operating Temperature Range

Logic 0 level 0 0.3*Vdd V

Logic 1 level 0.7*Vdd Vdd V

723 pF

-40 +85 °C

Typ.

Max. Unit

Note: 1 The product is factory calibrated at 3.3V

2 Typical specifications are not guaranteed

3 Minimum resonance frequency Fres=2.0kHz. Sensor bandwidth=1/(2*

*110kΩ*Cload) with

Cload>723pF

6/17 CD00068420

+ 11 hidden pages