Retired Product

This product has been retired from our catalog and is no longer for sale. This page is made available for those looking for datasheets and the simply curious.

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Description: This new version adds 2 standoff holes as well as an extra decoupling capacitor. Breakout board for the Analog Device ADXL345. The ADXL345 is a small, thin, low power, 3-axis MEMS accelerometer with high resolution (13-bit) measurement at up to ±16 g. 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°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion and 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.

Note: The package incorrectly advises that this sensor works at 3.3-5 VDC. The correct voltage range for this board is 2.0-3.6 VDC.


  • 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


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Customer Comments

  • Any one tried free fall detection using SPI?

  • Updated arduino sketch files please for mega2560R3? Otherwise the documents are pointless for people buying these products..

    • The Bildr tutorial has the updated code for Arduino 1.0, which should work with the Mega2560R3. Just be sure to wire to the correct pins on the Mega, which are located in different spots than on the Uno shown in the tutorial.

  • Just wanted to pass on a note of warning with the packaging of this part. On the back of the package (at least the one I received ) it states “It can be powered from 3.3V to 5V and has a multitude….” This is wrong, as the data sheet clearly states that the part has an operating range of 2V - 3.6V.

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