ADXL345 Просмотр технического описания (PDF) - Analog Devices
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ADXL345 Datasheet PDF : 40 Pages
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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
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