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EVAL-ADXL362Z-DB Datasheet(PDF) 1 Page - Analog Devices |
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EVAL-ADXL362Z-DB Datasheet(HTML) 1 Page - Analog Devices |
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1 / 44 page  Micropower, 3-Axis, ±2 g/±4 g/±8 g Digital Output MEMS Accelerometer Data Sheet ADXL362 Rev. B 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 ©2012–2013 Analog Devices, Inc. All rights reserved. Technical Support www.analog.com FEATURES Ultralow power Power can be derived from coin cell battery 1.8 µA @ 100 Hz ODR, 2.0 V supply 3.0 µA @ 400 Hz ODR, 2.0 V supply 270 nA motion activated wake-up mode 10 nA standby current High resolution: 1 mg/LSB Built-in features for system-level power savings: Adjustable threshold sleep/wake modes for motion activation Autonomous interrupt processing, without need for microcontroller intervention, to allow the rest of the system to be turned off completely Deep embedded FIFO minimizes host processor load Awake state output enables implementation of standalone, motion activated switch Low noise down to 175 µg/√Hz Wide supply and I/O voltage ranges: 1.6 V to 3.5 V Operates off 1.8 V to 3.3 V rails Acceleration sample synchronization via external trigger On-chip temperature sensor SPI digital interface Measurement ranges selectable via SPI command Small and thin 3 mm × 3.25 mm × 1.06 mm package APPLICATIONS Hearing aids Home healthcare devices Motion enabled power save switches Wireless sensors Motion enabled metering devices GENERAL DESCRIPTION The ADXL362 is an ultralow power, 3-axis MEMS accelerometer that consumes less than 2 µA at a 100 Hz output data rate and 270 nA when in motion triggered wake-up mode. Unlike accelerometers that use power duty cycling to achieve low power consumption, the ADXL362 does not alias input signals by undersampling; it samples the full bandwidth of the sensor at all data rates. The ADXL362 always provides 12-bit output resolution; 8-bit formatted data is also provided for more efficient single-byte transfers when a lower resolution is sufficient. Measurement ranges of ±2 g, ±4 g, and ±8 g are available, with a resolution of 1 mg/LSB on the ±2 g range. For applications where a noise level lower than the normal 550 µg/√Hz of the ADXL362 is desired, either of two lower noise modes (down to 175 µg/√Hz typical) can be selected at minimal increase in supply current. In addition to its ultralow power consumption, the ADXL362 has many features to enable true system level power reduction. It includes a deep multimode output FIFO, a built-in micropower temperature sensor, and several activity detection modes including adjustable threshold sleep and wake-up operation that can run as low as 270 nA at a 6 Hz (approximate) measurement rate. A pin output is provided to directly control an external switch when activity is detected, if desired. In addition, the ADXL362 has provisions for external control of sampling time and/or an external clock. The ADXL362 operates on a wide 1.6 V to 3.5 V supply range, and can interface, if necessary, to a host operating on a separate, lower supply voltage. The ADXL362 is available in a 3 mm × 3.25 mm × 1.06 mm package. FUNCTIONAL BLOCK DIAGRAM VS VDDI/O GND 3-AXIS MEMS SENSOR TEMPERATURE SENSOR AXIS DEMODULATORS ANTIALIASING FILTERS ADXL362 12-BIT ADC DIGITAL LOGIC, FIFO, AND SPI INT1 INT2 MOSI MISO CS SCLK Figure 1. |
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