ADXL322EB Analog Devices Inc, ADXL322EB Datasheet

EB: 2 AXIS 2 G Low Cost Evaluation Board

ADXL322EB

Manufacturer Part Number
ADXL322EB
Description
EB: 2 AXIS 2 G Low Cost Evaluation Board
Manufacturer
Analog Devices Inc
Series
iMEMS®r
Datasheets

Specifications of ADXL322EB

Sensor Type
Accelerometer, 2 Axis
Sensing Range
±2g
Interface
Analog
Sensitivity
420mV/g
Voltage - Supply
2.4 V ~ 6 V
Embedded
No
Utilized Ic / Part
ADXL322
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
Q2504151
FEATURES
Small and thin
2 mg resolution at 60 Hz
Wide supply voltage range: 2.4 V to 6 V
Low power: 340 μA at V
Good zero g bias stability
Good sensitivity accuracy
X-axis and Y-axis aligned to within 0.1° (typ)
BW adjustment with a single capacitor
Single-supply operation
10,000 g shock survival
Pb Free: Compatible with Sn/Pb and Pb-free solder processes
APPLICATIONS
Cost-sensitive motion- and tilt-sensing applications
Rev. 0
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 package
Smart hand-held devices
Mobile phones
Sports and health-related devices
PC security and PC peripherals
S
= 2.4 V (typ)
C
DC
+3V
SENSOR
FUNCTIONAL BLOCK DIAGRAM
V
COM
S
ADXL322
AMP
AC
ST
Small and Thin ±2 g Accelerometer
Figure 1.
DEMOD
GENERAL DESCRIPTION
The ADXL322 is a small, thin, low power, complete, dual-axis
accelerometer with signal conditioned voltage outputs, which
are all on a single monolithic IC. The product measures accel-
eration with a full-scale range of ±2 g (typical). It can also
measure both dynamic acceleration (vibration) and static
acceleration (gravity).
The ADXL322’s typical noise floor is 220 μg/√Hz, which allows
signals below 2 mg to be resolved in tilt-sensing applications
using narrow bandwidths (<60 Hz).
The user selects the bandwidth of the accelerometer using
capacitors C
of 0.5 Hz to 2.5 kHz can be selected to suit the application.
The ADXL322 is available in a 4 mm × 4 mm × 1.45 mm,
16-lead, plastic LFCSP.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Fax: 781.461.3113
R
32kΩ
FILT
OUTPUT
AMP
Y
C
OUT
Y
X
R
32kΩ
and C
FILT
OUTPUT
AMP
Y
X
C
© 2007 Analog Devices, Inc. All rights reserved.
at the X
OUT
X
OUT
and Y
OUT
pins. Bandwidths
ADXL322
www.analog.com

Related parts for ADXL322EB

ADXL322EB Summary of contents

Page 1

FEATURES Small and thin 4 mm × × 1.45 mm LFCSP package 2 mg resolution Wide supply voltage range: 2 Low power: 340 μ 2.4 V (typ) S ...

Page 2

ADXL322 TABLE OF CONTENTS Specifications..................................................................................... 3 Absolute Maximum Ratings............................................................ 4 ESD Caution.................................................................................. 4 Pin Configuration and Function Descriptions............................. 5 Typical Performance Characteristics (V Theory of Operation ...................................................................... 11 Performance ................................................................................ 11 Applications..................................................................................... 12 Power Supply Decoupling ......................................................... 12 REVISION HISTORY ...

Page 3

SPECIFICATIONS T = 25° 0.1 μF, Acceleration = 0 g, unless otherwise noted Table 1. Parameter SENSOR INPUT Measurement Range Nonlinearity Package Alignment Error Alignment Error Cross-Axis Sensitivity ...

Page 4

ADXL322 ABSOLUTE MAXIMUM RATINGS Table 2. Parameter Acceleration (Any Axis, Unpowered) Acceleration (Any Axis, Powered All Other Pins Output Short-Circuit Duration (Any Pin to Common) Operating Temperature Range Storage Temperature ESD CAUTION ESD (electrostatic discharge) sensitive device. Electrostatic ...

Page 5

PIN CONFIGURATION AND FUNCTION DESCRIPTIONS Table 3. Pin Function Descriptions Pin No. Mnemonic COM COM 6 COM 7 COM OUT OUT 13 ...

Page 6

ADXL322 Table 4. Recommended Soldering Profile Profile Feature Average Ramp Rate ( Preheat Minimum Temperature (T ) SMIN Minimum Temperature (T ) SMAX Time ( SMIN SMAX ...

Page 7

TYPICAL PERFORMANCE CHARACTERISTICS ( 1.40 1.42 1.44 1.46 1.48 1.50 1.52 1.54 1.56 1.58 1.60 OUTPUT (V) Figure 5. X-Axis Zero g Bias at 25° ...

Page 8

ADXL322 1.600 1.575 1.550 1.525 1.500 1.475 1.450 1.425 1.400 –40 – TEMPERATURE (°C) Figure 11. Zero g Bias vs. Temperature—Parts Soldered to PCB 150 160 170 180 190 ...

Page 9

SELF-TEST (V) Figure 17. X-Axis Self-Test Response at 25° 350 370 390 410 430 450 470 CURRENT ( μ A) ...

Page 10

ADXL322 X = 1.50V OUT Y = 1.92V OUT 1.08V OUT 322J #1234 Y = 1.50V OUT 5678P X = 1.50V OUT Y = 1.08V OUT 5678P X = 1.92V OUT #1234 322J Y = 1.50V OUT ...

Page 11

THEORY OF OPERATION The ADXL322 is a complete acceleration measurement system on a single monolithic IC. The ADXL322 has a measurement range of ± contains a polysilicon surface micromachined sensor and signal conditioning circuitry to implement an open- ...

Page 12

ADXL322 APPLICATIONS POWER SUPPLY DECOUPLING For most applications, a single 0.1 μF capacitor, C decouples the accelerometer from noise on the power supply. However, in some cases, particularly where noise is present at the 140 kHz internal clock frequency (or ...

Page 13

Peak-to-peak noise values give the best estimate of the uncer- tainty in a single measurement. Table 7 gives the typical noise output of the ADXL322 for various C and C X Table 7. Filter Capacitor Selection (C X Bandwidth C ...

Page 14

... ADXL322 OUTLINE DIMENSIONS PIN 1 INDICATOR 1.50 1.45 1.40 ORDERING GUIDE Measurement Model Range 1 ADXL322JCP ± ADXL322JCP–REEL ±2 g ADXL322EB 1 Lead finish—Matte tin. 0.20 MIN 12 4.15 TOP 4.00 SQ VIEW 3.85 0.65 BSC 9 0.55 0.50 0.45 0.05 MAX 0.02 NOM 0.35 COPLANARITY ...

Page 15

NOTES Rev Page ADXL322 ...

Page 16

ADXL322 NOTES © 2007 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D05589–0–6/07(0) Rev Page ...

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