ANALOG DEVICES ADXL335 Service Manual

Small, Low Power, 3-Axis ±3 g

www.BDTIC.com/ADI

Preliminary Technical Data

FEATURES

3-axis sensing
Small, low-profile package

4 mm × 4 mm × 1.45 mm LFCSP
Low power - 350 μA (typical)
Single-supply operation

1.8 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

Accelerometer

ADXL335

GENERAL DESCRIPTION

The ADXL335 is a small, thin, low power, complete 3-axis
accelerometer with signal conditioned voltage outputs. The
product measures acceleration with a minimum full-scale range
of ±3 g. It can measure the static acceleration of gravity in tilt­sensing applications, as well as dynamic acceleration resulting
from motion, shock, or vibration.

The user selects the bandwidth of the accelerometer using the
C

, CY, and CZ capacitors at the X

X

Bandwidths can be selected to suit the application, with a
range of 0.5 Hz to 1600 Hz for X and Y axes, and a range of

0.5 Hz to 550 Hz for the Z axis.

The ADXL335 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.

+3V

+3V

Vs

Vs

3-Axis

3-Axis

C

C

DC

DC

Sensor

Sensor

COM ST

COM ST

FUNCTIONAL BLOCK DIAGRAM

ADXL335

ADXL335

AC

AC

Amp

Amp

Figure 1.

Demod

Demod

Output

Output

Amp

Amp

Output

Output

Amp

Amp

Output

Output

Amp

Amp

~32kΩ

~32kΩ

~32kΩ

~32kΩ

~32kΩ

~32kΩ

X

X

OUT

OUT

C

C

X

X

Y

Y

OUT

OUT

C

C

Y

Y

Z

Z

OUT

OUT

C

C

Z

Z

Rev. PrA

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responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
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.

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: [phone] www.analog.com
Fax: [phone] ©2008 Analog Devices, Inc. All rights reserved.

ADXL335 Preliminary Technical Data

www.BDTIC.com/ADI

TABLE OF CONTENTS

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

Performance ...................................................................................6

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

Theory of Operation ........................................................................ 6

Mechanical Sensor ........................................................................ 6

REVISION HISTORY

Applications ........................................................................................7

Power Supply Decoupling ............................................................7

Setting the Bandwidth Using CX, CY, and C

Self Test ...........................................................................................7

Design Trade-Offs for Selecting Filter Characteristics: The

Noise/BW Trade-Off .....................................................................7

Use with Operating Voltages Other than 3 V ................................7

Axes of Acceleration Sensitivity ..................................................8

Outline Dimensions ..........................................................................9

Ordering Guide .............................................................................9

.............................7

Z

Rev. PrA | Page 2 of 11

Preliminary Technical Data ADXL335

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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
Interaxis 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 ±0.01 %/°C

S

ZERO g BIAS LEVEL (RATIOMETRIC)

0 g Voltage at X
0 g Voltage at Z

, Y

V

OUT

OUT

V

OUT

= 3 V 1.35 1.5 1.65 V

S

= 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

150 µg/√Hz rms

OUT

OUT

300 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 −300 mV

OUT

Self test 0 to 1 +300 mV

OUT

Self test 0 to 1 +550 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 1.8 3.6 V
Supply Current VS = 3 V 350 A
Turn-On Time7 No external filter 1 ms

TEMPERATURE

Operating Temperature Range −40 +85 °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. PrA | Page 3 of 11

ADXL335 Preliminary Technical Data

www.BDTIC.com/ADI

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 +3.6 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. PrA | Page 4 of 11