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ADXL311_15 Datasheet(Arkusz danych) 1 Page - Analog Devices

Numer części ADXL311_15
Szczegółowy opis  Ultracompact 2g Dual-Axis Accelerometer
Pobierz  12 Pages
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Strona internetowa  http://www.analog.com
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Ultracompact ±2g Dual-Axis Accelerometer
ADXL311
Rev. B
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: 781.326.8703
© 2005 Analog Devices, Inc. All rights reserved.
FEATURES
High resolution
Dual-axis accelerometer on a single IC chip
5 mm × 5 mm × 2 mm LCC package
Low power <400
µA (typ)
X-axis and Y-axis aligned to within 0.1° (typ)
BW adjustment with a single capacitor
Single-supply operation
High shock survival
APPLICATIONS
Tilt and motion sensing
Smart hand-held devices
Computer security
Input devices
Pedometers and activity monitors
Game controllers
Toys and entertainment products
FUNCTIONAL BLOCK DIAGRAM
COM
YOUT
XOUT
VDD
CX
ADXL311
Y SENSOR
3.0V
SELF TEST
X SENSOR
XFILT
32k
YFILT
32k
CY
CDC
OSCILLATOR
DEMOD
DEMOD
Figure 1.
GENERAL DESCRIPTION
The ADXL311 is a low power, complete dual-axis accelerometer
with signal conditioned voltage outputs, all on a single
monolithic IC. The ADXL311 is built using the same proven
iMEMS® process used in over 180 million Analog Devices
accelerometers shipped to date, with demonstrated 1 FIT
reliability (1 failure per 1 billion device operating hours).
The ADXL311 measures acceleration with a full-scale range of
±2 g. The ADXL311 can measure both dynamic acceleration
(e.g., vibration) and static acceleration (e.g., gravity). The
outputs are analog voltages proportional to acceleration.
The typical noise floor is 300 µg/√Hz, allowing signals below
2 mg (0.1° of inclination) to be resolved in tilt sensing appli-
cations using narrow bandwidths (10 Hz).
The user selects the bandwidth of the accelerometer using
capacitors CX and CY at the XOUT and YOUT pins. Bandwidths
of 1 Hz to 3 kHz can be selected to suit the application.
The ADXL311 is available in a 5 mm × 5 mm × 2 mm,
8-terminal, hermetic LCC package.




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