Small, Low Power, 3-Axis ±3
g
i
MEMS
®
Accelerometer
ADXL330
FEATURES
3-axis sensing
Small, low-profile package
4 mm × 4 mm × 1.45 mm LFCSP
Low power
180 μA at V
S
= 1.8 V (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
GENERAL DESCRIPTION
The ADXL330 is a small, thin, low power, complete 3-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
C
X
, C
Y
, and C
Z
capacitors at the X
OUT
, Y
OUT
, and Z
OUT
pins.
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 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).
APPLICATIONS
Cost-sensitive, low power, motion- and tilt-sensing
applications
Mobile devices
Gaming systems
Disk drive protection
Image stabilization
Sports and health devices
FUNCTIONAL BLOCK DIAGRAM
+3V
V
S
ADXL330
OUTPUT AMP
3-AXIS
SENSOR
C
DC
AC AMP
DEMOD
OUTPUT AMP
R
FILT
X
OUT
C
X
R
FILT
Y
OUT
C
Y
R
FILT
OUTPUT AMP
Z
OUT
C
Z
05677-001
COM
ST
Figure 1.
Rev. A
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
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: 781.329.4700
www.analog.com
Fax: 781.461.3113
©2007 Analog Devices, Inc. All rights reserved.
ADXL330
TABLE OF CONTENTS
Features .............................................................................................. 1
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
Performance................................................................................ 11
Applications..................................................................................... 12
Power Supply Decoupling ......................................................... 12
Setting the Bandwidth Using C
X
, C
Y
, and C
Z
.......................... 12
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
REVISION HISTORY
9/06—Rev. 0 to Rev. A
Changes to Ordering Guide .......................................................... 14
3/06—Revision 0: Initial Version
Rev. A | Page 2 of 16
ADXL330
SPECIFICATIONS
T
A
= 25°C, V
S
= 3 V, C
X
= C
Y
= C
Z
= 0.1 μF, acceleration = 0
g,
unless otherwise noted. All minimum and maximum specifications are
guaranteed. Typical specifications are not guaranteed.
Table 1.
Parameter
SENSOR INPUT
Measurement Range
Nonlinearity
Package Alignment Error
Interaxis Alignment Error
Cross Axis Sensitivity
1
SENSITIVITY (RATIOMETRIC)
2
Sensitivity at X
OUT
, Y
OUT
, Z
OUT
Sensitivity Change Due to Temperature
3
ZERO
g
BIAS LEVEL (RATIOMETRIC)
0
g
Voltage at X
OUT
, Y
OUT
, Z
OUT
0
g
Offset vs. Temperature
NOISE PERFORMANCE
Noise Density X
OUT
, Y
OUT
Noise Density Z
OUT
FREQUENCY RESPONSE
4
Bandwidth X
OUT
, Y
OUT 5
Bandwidth Z
OUT5
R
FILT
Tolerance
Sensor Resonant Frequency
SELF TEST
6
Logic Input Low
Logic Input High
ST Actuation Current
Output Change at X
OUT
Output Change at Y
OUT
Output Change at Z
OUT
OUTPUT AMPLIFIER
Output Swing Low
Output Swing High
POWER SUPPLY
Operating Voltage Range
Supply Current
Turn-On Time
7
TEMPERATURE
Operating Temperature Range
T
T
Conditions
Each axis
% of full scale
Min
±3
Typ
±3.6
±0.3
±1
±0.1
±1
300
±0.015
1.5
±1
280
350
Max
Unit
g
%
Degrees
Degrees
%
Each axis
V
S
= 3 V
V
S
= 3 V
Each axis
V
S
= 3 V
270
330
mV/g
%/°C
V
mg/°C
μg/√Hz rms
μg/√Hz rms
Hz
Hz
kΩ
kHz
V
V
μA
mV
mV
mV
V
V
1.2
1.8
No external filter
No external filter
1600
550
32 ± 15%
5.5
+0.6
+2.4
+60
−150
+150
−60
0.1
2.8
1.8
3.6
320
1
−25
+70
Self test 0 to 1
Self test 0 to 1
Self test 0 to 1
No load
No load
V
S
= 3 V
No external filter
V
μA
ms
°C
1
2
Defined as coupling between any two axes.
Sensitivity is essentially ratiometric to V
S
.
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 (C
X
, C
Y
, C
Z
).
5
Bandwidth with external capacitors = 1/(2 × π × 32 kΩ × C). For C
X
, C
Y
= 0.003 μF, bandwidth = 1.6 kHz. For C
Z
= 0.01 μF, bandwidth = 500 Hz. For C
X
, C
Y
, C
Z
= 10 μF,
bandwidth = 0.5 Hz.
6
Self-test response changes cubically with V
S
.
7
Turn-on time is dependent on C
X
, C
Y
, C
Z
and is approximately 160 × C
X
or C
Y
or C
Z
+ 1 ms, where C
X
, C
Y
, C
Z
are in μF.
Rev. A | Page 3 of 16
ADXL330
ABSOLUTE MAXIMUM RATINGS
Table 2.
Parameter
Acceleration (Any Axis, Unpowered)
Acceleration (Any Axis, Powered)
V
S
All Other Pins
Output Short-Circuit Duration
(Any Pin to Common)
Temperature Range (Powered)
Temperature Range (Storage)
Rating
10,000
g
10,000
g
−0.3 V to +7.0 V
(COM − 0.3 V) to (V
S
+ 0.3 V)
Indefinite
−55°C to +125°C
−65°C to +150°C
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.
T
P
RAMP-UP
TEMPERATURE
t
P
CRITICAL ZONE
T
L
TO T
P
T
L
T
SMAX
T
SMIN
t
L
t
S
PREHEAT
RAMP-DOWN
05677-002
t
25°C TO PEAK
TIME
Figure 2. Recommended Soldering Profile
Table 3. Recommended Soldering Profile
Profile Feature
Average Ramp Rate (T
L
to T
P
)
Preheat
Minimum Temperature (T
SMIN
)
Maximum Temperature (T
SMAX
)
Time (T
SMIN
to T
SMAX
), t
S
T
SMAX
to T
L
Ramp-Up Rate
Time Maintained Above Liquidous (T
L
)
Liquidous Temperature (T
L
)
Time (t
L
)
Peak Temperature (T
P
)
Time within 5°C of Actual Peak Temperature (t
P
)
Ramp-Down Rate
Time 25°C to Peak Temperature
Sn63/Pb37
3°C/s max
100°C
150°C
60 s to 120 s
3°C/s max
183°C
60 s to 150 s
240°C + 0°C/−5°C
10 s to 30 s
6°C/s max
6 minutes max
Pb-Free
3°C/s max
150°C
200°C
60 s to 180 s
3°C/s max
217°C
60 s to 150 s
260°C + 0°C/−5°C
20 s to 40 s
6°C/s 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. A | Page 4 of 16
ADXL330
PIN CONFIGURATION AND FUNCTION DESCRIPTIONS
0.50
MAX
0.65
16
15
14
13
12
11
10
9
7
8
NC
NC
V
S
V
S
4
0.325
NC
ST
COM
NC
1
2
3
4
5
ADXL330
TOP VIEW
(Not to Scale)
+Y
+Z
+X
6
X
OUT
NC
Y
OUT
NC
0.35
MAX
0.65
4
1.95
0.325
05677-029
COM
COM
COM
Z
OUT
NC = NO CONNECT
CENTER PAD IS NOT
INTERNALLY CONNECTED
BUT SHOULD BE SOLDERED
FOR MECHANICAL INTEGRITY
1.95
DIMENSIONS SHOWN IN MILLIMETERS
05677-032
Figure 3. Pin Configuration
Figure 4. Recommended PCB Layout
Table 4. Pin Function Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Mnemonic
NC
ST
COM
NC
COM
COM
COM
Z
OUT
NC
Y
OUT
NC
X
OUT
NC
V
S
V
S
NC
Description
No Connect
Self Test
Common
No Connect
Common
Common
Common
Z Channel Output
No Connect
Y Channel Output
No Connect
X Channel Output
No Connect
Supply Voltage (1.8 V to 3.6 V)
Supply Voltage (1.8 V to 3.6 V)
No Connect
Rev. A | Page 5 of 16
