Catalog
3-Axis, ±0.5g/±1g/±2g/±4gDigital Accelerometer
Key Features
• 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)
• 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 performance150 μg/√Hz typical for X- and Y-axes250 μg/√Hz typical for the Z-axis
• 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 resolutionFixed 10-bit resolution for anygrangeFixed 1024 LSB/gsensitivity for anygrangeResolution scales from 10-bit at ±0.5gto 13-bit at ±4g
• Fixed 10-bit resolution for anygrange
• Fixed 1024 LSB/gsensitivity for anygrange
• Resolution scales from 10-bit at ±0.5gto 13-bit at ±4g
• 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)
• 10,000gshock survival
• Pb free/RoHS compliant
• Small and thin: 5 mm × 5 mm × 1.45 mm LFCSP package
• Qualified for automotive applications
Description
AI
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.APPLICATIONSCar alarmsHill start aid (HSA) systemsElectronic parking brakesData recorders (black boxes)
