http://www.www.datasheet4u.com

900,000+ Datasheet PDF Search and Download

Datasheet4U offers most rated semiconductors datasheets pdf




Analog Devices Semiconductor Electronic Components Datasheet

ADXL345 Datasheet

Digital Accelerometer

No Preview Available !

ADXL345 pdf
Data Sheet
3-Axis, ±2 g/±4 g/±8 g/±16 g
Digital Accelerometer
ADXL345
FEATURES
GENERAL DESCRIPTION
Ultralow power: as low as 23 µA in measurement mode and
0.1 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)
Embedded memory management system with FIFO
technology minimizes host processor load
Single tap/double tap detection
Activity/inactivity monitoring
Free-fall detection
Supply voltage range: 2.0 V to 3.6 V
I/O voltage range: 1.7 V to VS
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 × 5 mm × 1 mm LGA package
APPLICATIONS
Handsets
Medical instrumentation
Gaming and pointing devices
Industrial instrumentation
Personal navigation devices
Hard disk drive (HDD) protection
The ADXL345 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 ADXL345 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 (3.9 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. These functions can
be mapped individually to either of two interrupt output pins.
An integrated memory management system with a 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 ADXL345 is supplied in a small, thin, 3 mm × 5 mm × 1 mm,
14-lead, plastic package.
FUNCTIONAL BLOCK DIAGRAM
VS VDD I/O
ADXL345
POWER
MANAGEMENT
3-AXIS
SENSOR
SENSE
ELECTRONICS
ADC
DIGITAL
FILTER
CONTROL
AND
INTERRUPT
LOGIC
INT1
INT2
32 LEVEL
FIFO
SERIAL I/O
SDA/SDI/SDIO
SDO/ALT
ADDRESS
SCL/SCLK
GND
CS
Figure 1.
Rev. E
Document Feedback
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.
Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700 ©2009–2015 Analog Devices, Inc. All rights reserved.
Technical Support
www.analog.com


Analog Devices Semiconductor Electronic Components Datasheet

ADXL345 Datasheet

Digital Accelerometer

No Preview Available !

ADXL345 pdf
ADXL345
TABLE OF CONTENTS
Features .............................................................................................. 1
Applications....................................................................................... 1
General Description ......................................................................... 1
Functional Block Diagram .............................................................. 1
Revision History ............................................................................... 3
Specifications..................................................................................... 4
Absolute Maximum Ratings............................................................ 6
Thermal Resistance ...................................................................... 6
Package Information .................................................................... 6
ESD Caution.................................................................................. 6
Pin Configuration and Function Descriptions............................. 7
Typical Performance Characteristics ............................................. 8
Theory of Operation ...................................................................... 13
Power Sequencing ...................................................................... 13
Power Savings ............................................................................. 14
Serial Communications ................................................................. 15
SPI................................................................................................. 15
I2C ................................................................................................. 18
Interrupts..................................................................................... 20
FIFO ............................................................................................. 21
Data Sheet
Self-Test ....................................................................................... 22
Register Map ................................................................................... 23
Register Definitions ................................................................... 24
Applications Information .............................................................. 28
Power Supply Decoupling ......................................................... 28
Mechanical Considerations for Mounting.............................. 28
Tap Detection.............................................................................. 28
Threshold .................................................................................... 29
Link Mode ................................................................................... 29
Sleep Mode vs. Low Power Mode............................................. 30
Offset Calibration....................................................................... 30
Using Self-Test ............................................................................ 31
Data Formatting of Upper Data Rates..................................... 32
Noise Performance ..................................................................... 33
Operation at Voltages Other Than 2.5 V ................................ 33
Offset Performance at Lowest Data Rates............................... 34
Axes of Acceleration Sensitivity ............................................... 35
Layout and Design Recommendations ................................... 36
Outline Dimensions ....................................................................... 37
Ordering Guide .......................................................................... 37
Rev. E | Page 2 of 40


Part Number ADXL345
Description Digital Accelerometer
Maker Analog Devices
Total Page 30 Pages
PDF Download
ADXL345 pdf
Download PDF File
ADXL345 pdf
View for Mobile






Related Datasheet

1 ADXL343 Digital MEMS Accelerometer Analog Devices
Analog Devices
ADXL343 pdf
2 ADXL344 Ultralow Power Digital MEMS Accelerometer Analog Devices
Analog Devices
ADXL344 pdf
3 ADXL345 Digital Accelerometer Analog Devices
Analog Devices
ADXL345 pdf
4 ADXL345-EP Digital Accelerometer Analog Devices
Analog Devices
ADXL345-EP pdf
5 ADXL346 Digital Accelerometer Analog Devices
Analog Devices
ADXL346 pdf




Part Number Start With

0    1    2    3    4    5    6    7    8    9    A    B    C    D    E    F    G    H    I    J    K    L    M    N    O    P    Q    R    S    T    U    V    W    X    Y    Z

site map

webmaste! click here

contact us

Buy Components