3-Axis, 0.5 g/ 1 g/ 2 g/ 4 g
Digital Accelerometer
Data Sheet
ADXL313
FEATURES
GENERAL DESCRIPTION
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
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°C to +105°C)
10,000 g shock survival
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 applica-
tions, 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.
Pb free/RoHS compliant
Small and thin: 5 mm × 5 mm × 1.45 mm LFCSP package
Qualified for automotive applications
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)
FUNCTIONAL BLOCK DIAGRAM
V
V
DD I/O
S
ADXL313
POWER
MANAGEMENT
INT1
INT2
CONTROL
AND
INTERRUPT
LOGIC
DIGITAL
FILTER
SENSE
ELECTRONICS
ADC
3-AXIS
SENSOR
SDA/SDI/SDIO
32-LEVEL
FIFO
SERIAL I/O
SDO/ALT
ADDRESS
SCL/SCLK
GND
CS
Figure 1.
Rev. 0
Document Feedback
Information furnished by Analog Devices is believed to be accurate and reliable. However, no
responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other
rights of third parties that may result from its use. Specifications subject to change without notice. No
license is granted by implication or otherwise under any patent or patent rights of Analog Devices.
Trademarks and registered trademarks are the property of their respective owners.
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781.329.4700
Technical Support
©2013 Analog Devices, Inc. All rights reserved.
www.analog.com