Micropower, 3-Axis, 2 g/4 g/8 g, Digital Output MEMS Accelerometer Data Sheet ADXL362-MI FEATURES GENERAL DESCRIPTION The ADXL362-MI is an ultralow power, 3-axis MEMS acceler- Ultralow power ometer that consumes less than 2 A at a 100 Hz output data rate Power can be derived from coin cell battery (ODR) and 270 nA when in motion triggered wake-up mode. 1.8 A at 100 Hz ODR, 2.0 V supply Unlike accelerometers that use power duty cycling to achieve low 3.0 A at 400 Hz ODR, 2.0 V supply power consumption, the ADXL362-MI does not alias input signals 270 nA, motion activated, wake-up mode by undersampling it samples the full bandwidth of the sensor at all 10 nA standby supply current, 2.0 V supply data rates. High resolution, sensitivity at X , Y , Z : 1 mg/LSB OUT OUT OUT Built in features for system level power savings The ADXL362-MI always provides 12-bit output resolution Adjustable threshold sleep/wake modes for motion 8-bit formatted data is also provided for more efficient single- activation byte transfers when a lower resolution is sufficient. Measurement Autonomous interrupt processing, without need for ranges of 2 g, 4 g, and 8 g are available, with a resolution of microcontroller intervention, to allow the rest of the 1 mg/LSB on the 2 g range. For applications where a noise system to be turned off completely level lower than the normal 550 g/Hz of the ADXL362-MI is Deep embedded FIFO minimizes host processor load desired, either of two lower noise modes (down to 175 g/Hz Awake state output enables implementation of standalone, typical) can be selected at minimal increase in supply current. motion activated switch In addition to its ultralow power consumption, the ADXL362-MI Low noise down to 175 g/Hz has many features to enable true system level power reduction. It Wide operating voltage range: 1.6 V to 3.5 V includes a deep multimode output, first in, first out (FIFO), Operates off 1.8 V to 3.3 V batteries a built in micropower temperature sensor, and several activity Special, high reliability manufacturing flow detection modes including adjustable threshold sleep and wake-up Acceleration sample synchronization via external trigger operation that can run as low as 270 nA at a 6 Hz (approximate) On-chip temperature sensor measurement rate. A pin output is provided to directly control an SPI digital interface external switch when activity is detected, if desired. In addition, the Measurement ranges selectable via SPI command ADXL362-MI has provisions for external control of sampling time Small and thin 3 mm 3.25 mm 1.06 mm package and/or an external clock. APPLICATIONS The ADXL362-MI operates on a wide 1.6 V to 3.5 V supply range, Medical implantable and can interface, if necessary, to a host operating on a separate, Clinical and home healthcare devices lower supply voltage. The ADXL362-MI is processed through a Hearing aids special, high reliability manufacturing flow involving additional Motion enabled power save switches and metering devices process, test, and quality controls to meet a higher quality and Wireless sensors reliability standard that gives more robustness to Class II medical devices and Class III medical devices. Further details are available with Analog Devices, Inc., consultation. The ADXL362-MI is available in a 3 mm 3.25 mm 1.06 mm LGA package. FUNCTIONAL BLOCK DIAGRAM V V S DD I/O ADXL362-MI INT1 INT2 3-AXIS MEMS DIGITAL 12-BIT MOSI SENSOR LOGIC, ADC FIFO, MISO AND SPI CS SCLK TEMPERATURE AXIS ANTIALIASING SENSOR DEMODULATORS FILTERS GND Figure 1. For more information on the ADXL362-MI, contact Analog Devices, Inc., at healthcare-support analog.com. Rev. SpC 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 One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. rights of third parties that may result from its use. Specifications subject to change without notice. Tel: 781.329.4700 20172020 Analog Devices, Inc. All rights reserved. No license is granted by implication or otherwise under any patent or patent rights of Analog Technical Support www.analog.com Devices. Trademarks and registered trademarks are the property of their respective owners. 1 619 1-001ADXL362-MI Data Sheet NOTES 20172020 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. D16191F-3/20(SpC) Rev. SpC Page 2 of 2