ANALOG DEVICES ADXL330 Service Manual

Small, Low Power, 3-Axis ±3 g

V

FEATURES

3-axis sensing
Small, low-profile package

4 mm × 4 mm × 1.45 mm LFCSP

Low power

200 μA at V

Single-supply operation

2.0 V to 3.6 V
10,000 g shock survival
Excellent temperature stability
BW adjustment with a single capacitor per axis
RoHS/WEEE lead-free compliant

APPLICATIONS

Cost-sensitive, low power, motion- and tilt-sensing
applications

Mobile devices
Gaming systems
Disk drive protection
Image stabilization
Sports and health devices

= 2.0 V (typical)

S

i

MEMS® Accelerometer

ADXL330

GENERAL DESCRIPTION

The ADXL330 is a small, thin, low power, complete three axis
accelerometer with signal conditioned voltage outputs, all
on a single monolithic IC. The product measures acceleration
with a minimum full-scale range of ±3 g. It can measure the
static acceleration of gravity in tilt-sensing applications, as well
as dynamic acceleration resulting from motion, shock, or
vibration.

The user selects the bandwidth of the accelerometer using the

, CY, and CZ capacitors at the X

C

X

Bandwidths can be selected to suit the application, with a
range of 0.5 Hz to 1,600 Hz for X and Y axes, and a range of

0.5 Hz to 550 Hz for the Z axis.

The ADXL330 is available in a small, low-profile, 4 mm × 4 mm
× 1.45 mm, 16-lead, plastic lead frame chip scale package
(LFCSP_LQ).

OUT

, Y

OUT

, and Z

OUT

pins.

FUNCTIONAL BLOCK DIAGRAM

+3

V

S

ADXL330

3-AXIS

C

DC

Rev. 0

Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Anal og Devices for its use, nor for any infringements of patents or ot her
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.

SENSOR

AC AMP DEMOD

COM ST

R

X

FILT

OUTPUT AMP

OUTPUT AMP

OUTPUT AMP

Figure 1.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2006 Analog Devices, Inc. All rights reserved.

OUT

C

X

R

FILT

Y

OUT

C

Y

R

FILT

Z

OUT

C

Z

5677-001

ADXL330

TABLE OF CONTENTS

Features.............................................................................................. 1

Performance................................................................................ 11

Applications....................................................................................... 1

General Description......................................................................... 1

Functional Block Diagram ..............................................................1

Revision History ...............................................................................2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution.................................................................................. 4

Pin Configuration and Function Descriptions............................. 5

Typical Performance Characteristics............................................. 6

Theory of Operation ......................................................................11

Mechanical Sensor...................................................................... 11

REVISION HISTORY

3/06—Revision 0: Initial Version

Applications..................................................................................... 12

Power Supply Decoupling......................................................... 12

Setting the Bandwidth Using CX, CY and C

Self-Test ....................................................................................... 12

Design Trade-Offs for Selecting Filter Characteristics: The

Noise/BW Trade-Off.................................................................. 12

Use with Operating Voltages Other than 3 V............................. 12

Axes of Acceleration Sensitivity ...............................................13

Outline Dimensions....................................................................... 14

Ordering Guide .......................................................................... 14

........................... 12

Z

Rev. 0 | Page 2 of 16

ADXL330

SPECIFICATIONS

TA = 25°C, VS = 3 V, CX = CY = CZ = 0.1 μF, acceleration = 0 g, unless otherwise noted. All minimum and maximum specifications are
guaranteed. Typical specifications are not guaranteed.

Table 1.

Parameter Conditions Min Typ Max Unit

SENSOR INPUT Each axis

Measurement Range ±3 ±3.6
Nonlinearity % of full scale ±0.3 %
Package Alignment Error ±1 Degrees
Inter-Axis Alignment Error ±0.1 Degrees
Cross Axis Sensitivity1 ±1 %

SENSITIVITY (RATIOMETRIC)2 Each axis

Sensitivity at X
Sensitivity Change Due to Temperature3 V

OUT

, Y

, Z

V

OUT

OUT

= 3 V 270 300 330 mV/g

S

= 3 V ±0.015 %/°C

S

ZERO g BIAS LEVEL (RATIOMETRIC) Each axis

0 g Voltage at X

OUT

, Y

, Z

V

OUT

OUT

= 3 V 1.2 1.5 1.8 V

S

0 g Offset vs. Temperature ±1 mg/°C

NOISE PERFORMANCE

Noise Density X
Noise Density Z

, Y

280 µg/√Hz rms

OUT

OUT

350 µg/√Hz rms

OUT

FREQUENCY RESPONSE4

Bandwidth X
Bandwidth Z
R

Tolerance 32 ± 15% kΩ

FILT

5

, Y

OUT

OUT

No external filter 1600 Hz

OUT

5

No external filter 550 Hz

Sensor Resonant Frequency 5.5 kHz

SELF-TEST6

Logic Input Low +0.6 V
Logic Input High +2.4 V
ST Actuation Current +60 A
Output Change at X
Output Change at Y
Output Change at Z

Self-test 0 to 1 −150 mV

OUT

Self-test 0 to 1 +150 mV

OUT

Self-test 0 to 1 −60 mV

OUT

OUTPUT AMPLIFIER

Output Swing Low No load 0.1 V
Output Swing High No load 2.8 V

POWER SUPPLY

Operating Voltage Range 2.0 3.6 V
Supply Current VS = 3 V 320 A
Turn-On Time7 No external filter 1 ms

TEMPERATURE

Operating Temperature Range −25 +70 °C

1

Defined as coupling between any two axes.

2

Sensitivity is essentially ratiometric to VS.

3

Defined as the output change from ambient-to-maximum temperature or ambient-to-minimum temperature.

4

Actual frequency response controlled by user-supplied external filter capacitors (CX, CY, CZ).

5

Bandwidth with external capacitors = 1/(2 × π × 32 kΩ × C). For CX, CY = 0.003 µF, bandwidth = 1.6 kHz. For CZ = 0.01 µF, bandwidth = 500 Hz. For CX, CY, CZ = 10 µF,

bandwidth = 0.5 Hz.

6

Self-test response changes cubically with VS.

7

Turn-on time is dependent on CX, CY, CZ and is approximately 160 × CX or CY or CZ + 1 ms, where CX, CY, CZ are in µF.

g

Rev. 0 | Page 3 of 16

ADXL330

ABSOLUTE MAXIMUM RATINGS

Table 2.

Parameter Rating

Acceleration (Any Axis, Unpowered) 10,000 g
Acceleration (Any Axis, Powered) 10,000 g
VS −0.3 V to +7.0 V
All Other Pins (COM − 0.3 V) to (VS + 0.3 V)
Output Short-Circuit Duration

Indefinite

(Any Pin to Common)

Stresses above those listed under Absolute Maximum Ratings
may cause permanent damage to the device. This is a stress
rating only; functional operation of the device at these or any
other conditions above those indicated in the operational
section of this specification is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect
device reliability.

Temperature Range (Powered) −55°C to +125°C
Temperature Range (Storage) −65°C to +150°C

CRITICAL Z ONE

t

L

T

TO T

L

P

05677-002

TEMPERATURE

t

T

P

T

L

T

SMAX

T

SMIN

PREHEAT

t

25°C TO PEA K

Figure 2. Recommended Soldering Profile

RAMP-UP

t

S

P

RAMP-DOWN

TIME

Table 3. Recommended Soldering Profile

Profile Feature Sn63/Pb37 Pb-Free

Average Ramp Rate (TL to TP) 3°C/s max 3°C/s max
Preheat

Minimum Temperature (T

Maximum Temperature (T

Time (T
T

to TL

SMAX

SMIN

to T

), tS 60 s to 120 s 60 s to 180 s

SMAX

) 100°C 150°C

SMIN

) 150°C 200°C

SMAX

Ramp-Up Rate 3°C/s max 3°C/s max
Time Maintained Above Liquidous (TL)

Liquidous Temperature (TL) 183°C 217°C

Time (tL) 60 s to 150 s 60 s to 150 s
Peak Temperature (TP) 240°C + 0°C/−5°C 260°C + 0°C/−5°C
Time within 5°C of Actual Peak Temperature (tP) 10 s to 30 s 20 s to 40 s
Ramp-Down Rate 6°C/s max 6°C/s max
Time 25°C to Peak Temperature 6 minutes max 8 minutes max

ESD CAUTION

ESD (electrostatic discharge) sensitive device. Electrostatic charges as high as 4000 V readily accumulate on the
human body and test equipment and can discharge without detection. Although this product features
proprietary ESD protection circuitry, permanent damage may occur on devices subjected to high energy
electrostatic discharges. Therefore, proper ESD precautions are recommended to avoid performance
degradation or loss of functionality.

Rev. 0 | Page 4 of 16

ADXL330

T

T

C

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS

S

V

14

ADXL330

TOP VIEW

+Z

+X

COM

S

NC

13

12

X

OU

11

NC

+Y

10

Y

OU

9

NC

OUT

COM

Z

05677-029

0.35

MAX

ENTER PAD IS NO T
INTERNALLY CONNECTED
BUT SHOULD BE SOLDERED
FOR MECHANICAL INTEGRITY

NC

COM

NC

1

2

ST

3

4

NC15V

16

(Not to Scale)

5678

COM

NC = NO CONNECT

Figure 3. Pin Configuration

Table 4. Pin Function Descriptions

Pin No. Mnemonic Description

1 NC No Connect
2 ST Self-Test
3 COM Common
4 NC No Connect
5 COM Common
6 COM Common
7 COM Common
8 Z

Z Channel Output

OUT

9 NC No Connect
10 Y

Y Channel Output

OUT

11 NC No Connect
12 X

X Channel Output

OUT

13 NC No Connect
14 VS Supply Voltage (2.0 V to 3.6 V)
15 VS Supply Voltage (2.0 V to 3.6 V)
16 NC No Connect

0.50
MAX

1.95

0.65 0.325

1.95

DIMENSIONS SHOWN IN MILLIMETERS

Figure 4. Recommended PCB Layout

4

0.65

4

0.325

05677-032

Rev. 0 | Page 5 of 16