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ADXL346BCCZ Folha de dados(PDF) 1 Page - Analog Devices

Nome de Peças ADXL346BCCZ
Descrição Electrónicos  3-Axis, 짹2 g/짹4 g/짹8 g/짹16 g Ultralow Power Digital Accelerometer
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Fabricante Electrônico  AD [Analog Devices]
Página de início  http://www.analog.com
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3-Axis, ±2 g/±4 g/±8 g/±16 g
Ultralow Power Digital Accelerometer
Preliminary Technical Data
ADXL346
Rev. PrC
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibilityisassumedbyAnalogDevices for itsuse,nor foranyinfringementsofpatentsor other
rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.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. See the last
page for disclaimers.
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
©2009 Analog Devices, Inc. All rights reserved.
FEATURES
Ultralow power: as low as 35 µA in measurement mode and
1 µA in standby mode at VS = 2.5 V (typical)
Power consumption scales automatically with bandwidth
User-selectable resolution
Fixed 10-bit resolution
Full resolution, where resolution increases with g range,
up to 13-bit resolution at ±16 g (maintaining 4 mg/LSB
scale factor in all g ranges)
Patent pending, embedded memory management system
with FIFO technology minimizes host processor load
Single tap/double tap detection
Activity/inactivity monitoring
Free-fall detection
Concurrent four- and six-position orientation detection
Supply and I/O voltage range: 1.7 V to 2.75 V
SPI (3- and 4-wire) and I2C digital interfaces
Flexible interrupt modes mappable to either interrupt pin
Measurement ranges selectable via serial command
Bandwidth selectable via serial command
Wide temperature range (−40°C to +85°C)
10,000 g shock survival
Pb free/RoHS compliant
Small and thin: 3 mm × 3 mm × 0.95 mm LGA package
APPLICATIONS
Handsets
Medical instrumentation
Gaming and pointing devices
Industrial instrumentation
Personal navigation devices
Hard disk drive (HDD) protection
GENERAL DESCRIPTION
The ADXL346 is a small, thin, ultralow power, 3-axis accelerometer
with high resolution (13-bit) measurement at up to ±16 g. Digital
output data is formatted as 16-bit twos complement and is acces-
sible through either a SPI (3- or 4-wire) or I2C digital interface.
The ADXL346 is well suited for mobile device applications. It
measures the static acceleration of gravity in tilt-sensing appli-
cations, as well as dynamic acceleration resulting from motion
or shock. Its high resolution (4 mg/LSB) enables measurement
of inclination changes less than 1.0°.
Several special sensing functions are provided. Activity and
inactivity sensing detect the presence or lack of motion by
comparing the acceleration on any axis with user-set thresholds.
Tap sensing detects single and double taps in any direction. Free-
fall sensing detects if the device is falling. Orientation detection
is capable of concurrent four- and six-position sensing and a
user-selectable interrupt on orientation change for 2-D or 3-D
applications. These functions can be mapped individually to
either of two interrupt output pins. An integrated, patent pending
memory management system with 32-level first in, first out (FIFO)
buffer can be used to store data to minimize host processor activity
and lower overall system power consumption.
Low power modes enable intelligent motion-based power
management with threshold sensing and active acceleration
measurement at extremely low power dissipation.
The ADXL346 is supplied in a small, thin, 3 mm × 3 mm ×
0.95 mm, 16-lead, plastic package.
FUNCTIONAL BLOCK DIAGRAM
3-AXIS
SENSOR
SENSE
ELECTRONICS
DIGITAL
FILTER
ADXL346
POWER
MANAGEMENT
CONTROL
AND
INTERRUPT
LOGIC
SERIAL I/O
INT1
VS
VDD I/O
INT2
SDA/SDI/SDIO
SDO/ALT
ADDRESS
SCL/SCLK
GND
ADC
32 LEVEL
FIFO
CS
Figure 1.


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