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ADXL313WACPZ-RL7 Scheda tecnica(PDF) 1 Page - Analog Devices |
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ADXL313WACPZ-RL7 Scheda tecnica(HTML) 1 Page - Analog Devices |
1 / 28 page 3-Axis, ±0.5 g/±1 g/±2 g/±4 g Digital Accelerometer Data Sheet ADXL313 Rev. 0 Document Feedback Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 ©2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com 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) 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 Pb free/RoHS compliant Small and thin: 5 mm × 5 mm × 1.45 mm LFCSP package Qualified for automotive applications APPLICATIONS Car alarms Hill start aid (HSA) systems Electronic parking brakes Data recorders (black boxes) GENERAL DESCRIPTION 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. 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. FUNCTIONAL BLOCK DIAGRAM Figure 1. 3-AXIS SENSOR SENSE ELECTRONICS DIGITAL FILTER ADXL313 POWER MANAGEMENT CONTROL AND INTERRUPT LOGIC SERIAL I/O INT1 VS VDD I/O INT2 SDA/SDI/SDIO SDO/ALT ADDRESS SCL/SCLK GND ADC 32-LEVEL FIFO CS |
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