ADXL345 Triple Axis Accelerometer

The ADXL345 is a small, thin, low power, 3-axis 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 degrees.

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.

Features:

• Digital Output: SPI / I2C
• Low Power Consumption
• Compact Accelemotor / inclinometer
• 5V/3.3V input support.
• PCB Board double-sided gold-plated Size: 28mm x 14 mm
• lower pressure drop than the 1117, use on-board RT9161 chip for power
• faster load the appropriate speed
• ideal for noisy power environment
• Pin Standard 100mil (2.54mm), make it easily connect to development board.

Documentation:

• Quickstart Guide
• Bildr Tutorial