This ADXL345 is dynamic acceleration resulting from motion or shock, also well suited to measures the static acceleration of gravity in tilt-sensing applications.Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0°.
The new version adds 2 standoff holes as well as an extra decoupling capacitor. This 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.
Various 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. All 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 consumption.
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