ADXL327 Analog Devices, Inc., ADXL327 Datasheet

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ADXL327

Manufacturer Part Number
ADXL327
Description
Small, Low Power, 3-axis ?2 G Accelerometer
Manufacturer
Analog Devices, Inc.
Datasheet

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Preliminary Technical Data
FEATURES
3-axis sensing
Small, low-profile package
Low power - 350 μA (typical)
Single-supply operation
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
Rev. PrA
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.
4 mm × 4 mm × 1.45 mm LFCSP
1.8 V to 3.6 V
Mobile devices
Gaming systems
Disk drive protection
Image stabilization
Sports and health devices
C
C
DC
DC
+3V
+3V
Sensor
Sensor
3-Axis
3-Axis
COM
COM
Vs
Vs
ST
ST
FUNCTIONAL BLOCK DIAGRAM
Figure 1. ADXL327 Simplified Block Diagram
Amp
Amp
AC
AC
ADXL327
ADXL335
ADXL335
Demod
Demod
Small, Low Power, 3-Axis ±2 g
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
GENERAL DESCRIPTION
The ADXL327 is a small, low power, complete 3-axis
accelerometer with signal conditioned voltage outputs. The
product measures acceleration with a minimum full-scale range
of ±2 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
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 ADXL327 is available in a small, low profile, 4 mm × 4 mm
× 1.45 mm, 16-lead, plastic lead frame chip scale package
(LFCSP_LQ).
X
, C
Y
, and C
Z
capacitors at the X
Output
Output
Output
Output
Output
Output
Amp
Amp
Amp
Amp
Amp
Amp
©2008 Analog Devices, Inc. All rights reserved.
Accelerometer
~32kΩ
~32kΩ
~32kΩ
~32kΩ
~32kΩ
~32kΩ
OUT
, Y
OUT
, and Z
ADXL327
X
X
Y
Y
Z
Z
OUT
OUT
OUT
OUT
OUT
OUT
www.analog.com
C
C
C
C
OUT
C
C
X
X
Y
Y
Z
Z
pins.

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ADXL327 Summary of contents

Page 1

... Bandwidths can be selected to suit the application, with a range of 0 1600 Hz for X and Y axes, and a range of 0 550 Hz for the Z axis. The ADXL327 is available in a small, low profile × × 1.45 mm, 16-lead, plastic lead frame chip scale package (LFCSP_LQ). FUNCTIONAL BLOCK DIAGRAM ...

Page 2

... ADXL327 TABLE OF CONTENTS Features .............................................................................................. 1 Applications ....................................................................................... 1 General Description ......................................................................... 1 Functional Block Diagram .............................................................. 1 Specifications ..................................................................................... 3 Absolute Maximum Ratings ............................................................ 4 ESD Caution .................................................................................. 4 Pin Configuration and Function Descriptions ............................. 5 Theory of Operation ........................................................................ 6 Mechanical Sensor ........................................................................ 6 Performance .................................................................................. 6 Preliminary Technical Data Applications ........................................................................................7 Power Supply Decoupling ............................................................7 Setting the Bandwidth Using C Self Test ...........................................................................................7 Design Trade-Offs for Selecting Filter Characteristics: The Noise/BW Trade-Off ...

Page 3

... V 1.5 1.8 V ±1 mg/°C 250 μg/√Hz rms 1600 Hz 550 Hz 32 ± 15% kΩ 5.5 kHz +0.6 V +2.4 V +60 μA −450 -850 mV +450 +850 mV +770 +1400 mV 0.1 V 2.8 V 3.6 V 350 μ +85 °C = 0.01 μF, bandwidth = 500 Hz. For are in μ ADXL327 , μ ...

Page 4

... ADXL327 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Rating Acceleration (Any Axis, Unpowered) 10,000 g Acceleration (Any Axis, Powered) 10,000 g V −0 +3 All Other Pins (COM − 0 Output Short-Circuit Duration Indefinite (Any Pin to Common) Temperature Range (Powered) −55°C to +125°C Temperature Range (Storage) − ...

Page 5

... No Connect Common Common Common Z Channel Output No Connect (or optionally ground) Y Channel Output 1 No Connect X Channel Output 1 No Connect Supply Voltage (1 3.6 V) Supply Voltage (1 3 Connect Rev. PrA | Page ADXL327 0.50 4 MAX 0.65 0.325 1.95 1.95 DIMENSIONS SHOWN IN MILLIMETERS Figure 4. Recommended PCB Layout 0.65 4 0.325 ...

Page 6

... Preliminary Technical Data MECHANICAL SENSOR The ADXL327 uses a single structure for sensing the X, Y, and Z axes result, the three axes sense directions are highly orthogonal with little cross axis sensitivity. Mechanical mis- alignment of the sensor die to the package is the chief source of cross axis sensitivity ...

Page 7

... Additionally, a larger bulk bypass capacitor (1 μF or greater) can be added in parallel to C the connection from the ADXL327 ground to the power supply ground is low impedance because noise transmitted through ground has a similar effect as noise transmitted through V ...

Page 8

... For example 3.6 V, the self test response for the ADXL327 is S approximately −780 mV for the X-axis, +780 mV for the Y-axis, and +1330 mV for the Z-axis. ...

Page 9

... V −40°C to +85° −40°C to +85° −40°C to +85°C Rev. PrA | Page 0.20 MIN PIN 1 INDICATOR 2.43 BO TTOM 1.75 SQ VIEW 1. 1.95 BSC Package Description 16-Lead LFCSP_LQ 16-Lead LFCSP_LQ 16-Lead LFCSP_LQ Evaluation Board ADXL327 Package Option CP-16-5a CP-16-5a CP-16-5a ...

Page 10

... ADXL327 NOTES Preliminary Technical Data Rev. PrA | Page ...

Page 11

... Preliminary Technical Data NOTES ©2008 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. PR07949-0-11/08(PrA) Rev. PrA | Page ADXL327 ...

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