Product Details
●The ADXL313 is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement up to ±4_g_. Digital output data is formatted as 16-bit twos complement and is accessible through either a serial port interface (SPI) (3-wire or 4-wire) or I2C digital interface.
●The ADXL313 is well suited for car alarm or black box applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (1024 LSB/_g_) and low noise (150 μ_g_/√Hz) enable resolution of inclination changes of as little as 0.1°. A built-in FIFO facilitates using oversampling techniques to improve resolution to as little as 0.025° of inclination.
●Several built-in sensing functions are provided. Activity and inactivity sensing detects the presence or absence of motion and whether the acceleration on any axis exceeds a user-set level. These functions can be mapped to interrupt output pins. An integrated 32-level FIFO can be used to store data to minimize host processor intervention, resulting in reduced system power consumption.
●Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.
●The ADXL313 is supplied in a small, thin 5 mm × 5 mm × 1.45 mm, 32-lead LFCSP package and is pin compatible with the ADXL312 accelerometer device.
●Applications
● Car alarms
● Hill start aid (HSA) systems
● Electronic parking brakes
● Data recorders (black boxes)
●### Features and Benefits
● Ultralow power (scales automatically with data rate)
● As low as 30 μA in measurement mode (VS = 3.3 V)
● As low as 0.1 μA in standby mode (VS = 3.3 V)
● Low noise performance
● 150 μ_g_/√Hz typical for X- and Y-axes
● 250 μ_g_/√Hz typical for the Z-axis
● Embedded, patent pending FIFO technology minimizes host processor load
● User-selectable resolution
● Fixed 10-bit resolution for any _g_ range
● Fixed 1024 LSB/_g_ sensitivity for any _g_ range
● Resolution scales from 10-bit at ±0.5 _g_ to 13-bit at ±4 _g_
● Built-in motion detection functions for activity/inactivity monitoring
● Supply and I/O voltage range: 2.0 V to 3.6 V
● See data sheet for additional features
