The ADXL313WACPZ-RL7 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 ADXL313WACPZ-RL7 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 ADXL313WACPZ-RL7 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.
Feature
- 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 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 ±0.5 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
Applications
- Car alarms
- Hill start aid (HSA) systems
- Electronic parking brakes
- Data recorders (black boxes)
(Picture: Pinout)
