Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion and acceleration on any axis which exceeds a user-set level. Tap sensing detects single and double taps. Free-fall sensing detects if the device is falling. These functions can all be mapped to one of two interrupt output pins.

Features:

• 3 to 5VDC Supply Voltage
• Ultra Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V
• Sensitivity:
  1. X: 28.6 LSB/g.
  2. Y: 31.2 LSB/g.
  3. Z: 34.5 LSB/g.
• Tap/Double Tap Detection
• Free-Fall Detection
• SPI and I2C interfaces

Documents:

• ADXL345 Datasheet
• ADXL345 Accelerometer Arduino Demo Code