ADI ADXL313WACPZ-RL

The ADXL313 is a small, thin, low power, 3- axis accelerometer with high resolution (13- bit) measurement up to ±4g. 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 μg/√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.

• Ultralow power (scales automatically with data rate)
• As low as 30 μA in measurement mode (Vₛ = 3.3V)
• As low as 0.1 μA in standby mode (Vₛ = 3.3V)
• Low noise performance: 150 μg/√Hz typical for X- and Y- axes, 250 μg/√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 ±0.5g to 13- bit at ±4g
• Built- in motion detection functions for activity/inactivity monitoring
• Supply and I/O voltage range: 2.0V to 3.6V
• SPI (3- wire and 4- wire) and I²C digital interfaces
• Flexible interrupt modes mappable to two interrupt pins
• Measurement range selectable via serial command
• Bandwidth selectable via serial command
• Wide temperature range (- 40℃ to +105℃)
• 10,000g shock survival
• Pb free/RoHS compliant
• Small and thin: 5 mm×5 mm×1.45 mm LFCSP package
• Qualified for automotive applications

• Car alarms
• Hill start aid (HSA) systems
• Electronic parking brakes
• Data recorders (black boxes)