The ADXL345 series 3-axis Digital 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. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (3.9mg/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 by comparing the acceleration on any axis with user-set thresholds. An integrated memory management system with a 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption.
Ultra-low power - as low as 23μA in measurement mode and 0.1μA in standby mode at VS = 2.5V
Power consumption scales automatically with bandwidth
User-selectable resolution from 10 to 13-bit
4mg/LSB scale factor in all g ranges
32 Sample FIFO minimizes host processor load
Single tap, double tap and free-fall detection
Flexible interrupt modes mappable to either interrupt pin
(EN)
