Datasheet

ADXL345 Data Sheet
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
I
2
C ................................................................................................. 18
Interrupts ..................................................................................... 20
FIFO ............................................................................................. 21
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
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