SparkFun Triple Axis Accelerometer - ADXL345




$27.95 ea.

Breakout board for the Analog Device ADXL345. The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16G.

Description [Hide]

Here's another SparkFun breakout board, this time featuring the Analog Device ADXL345. This new version adds 2 standoff holes as well as an extra decoupling capacitor. The ADXL345 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16G. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 is well suited to measures the static acceleration of gravity in tilt-sensing applications, 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°.

So big dea - another accelerometer. Ah, but wait! This sensor has several built-in special functions:

  • Detect activity and inactivity sensing
  • Detect the presence or lack of motion
  • Alert if the acceleration on any axis exceeds a user-set level. 
  • Tap sensing detects single and double taps.
  • Free-fall sensing detects if the device is falling. 

These functions can be mapped to one of two interrupt output pins. An integrated, patent pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention. Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.


  • 2.0-3.6VDC Supply Voltage
  • Ultra Low Power: 40uA in measurement mode, 0.1uA in standby@ 2.5V
  • Tap/Double Tap Detection
  • Free-Fall Detection
  • SPI and I2C interfaces

Documentation [Hide]

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