Micropower 3-Sensor Combination Including Acceleration and Temperature Data Sheet ADXL363 FEATURES GENERAL DESCRIPTION Accelerometer, temperature sensor, and provision for third The ADXL363 is an ultralow power, three-sensor combination analog sensor input consisting of a 3-axis MEMS accelerometer, a temperature sensor, All sensors sampled synchronously and an on-board analog-to-digital converter (ADC) input for Up to 400 Hz ODR synchronous conversion of an external signal. The entire system Samples can be synchronized to external trigger consumes less than 2 A at a 100 Hz output data rate and Ultralow power 270 nA when in motion triggered wake-up mode. 1.95 A at 100 Hz ODR, 2.0 V supply, all sensors on The ADXL363 communicates via a serial port interface (SPI) 270 nA at 6 Hz motion activated wake-up mode and always provides 12-bit output resolution for all three 10 nA standby current sensors. 12-bit resolution for all sensors The ADXL363 accelerometer provides selectable measurement Acceleration scale factor down to 1 mg/LSB ranges of 2 g, 4 g, and 8 g, with a resolution of 1 mg/LSB on Temperature scale factor: 0.065C/LSB (typical) the 2 g range. Unlike accelerometers that use power duty cycling Built-in features for motion-based system level power savings to achieve low power consumption, the ADXL363 does not alias Adjustable threshold sleep/wake modes for motion input signals by undersampling it samples the full bandwidth of activation the sensor at all data rates. Autonomous interrupt processing, without need for microcontroller intervention, to allow the rest of the The ADXL363 temperature sensor operates with a scale factor system to be turned off completely of 0.065C/LSB (typical). Acceleration and temperature data can Deep embedded FIFO minimizes host processor load be stored in a 512-sample multimode first in, first out (FIFO) Awake state output enables implementation of buffer, allowing up to 13 sec of data to be stored. standalone, motion activated switch In addition to the accelerometer and temperature sensor, the Wide supply and I/O voltage ranges: 1.6 V to 3.5 V ADXL363 also provides access to an internal ADC for synchronous Operates off 1.8 V to 3.3 V rails conversion of an additional analog input. Power can be derived from coin cell battery The ADXL363 operates on a wide 1.6 V to 3.5 V supply range, SPI digital interface and can interface, if necessary, to a host operating on a separate, Small and thin 3 mm 3.25 mm 1.06 mm package lower supply voltage. The ADXL363 is available in a 3 mm APPLICATIONS 3.25 mm 1.06 mm package. Home healthcare devices Wireless sensors Motion enabled metering devices FUNCTIONAL BLOCK DIAGRAM V V S DD I/O 3-AXIS INT1 MEMS INT2 SENSOR 12-BIT DIGITAL MOSI ADC FIFO AND MISO SPI CS AXIS ANTIALIASING SCLK DEMODULATORS FILTERS TEMPERATURE SENSOR ADXL363 ADC IN GND Figure 1. Rev. A 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. No Tel: 781.329.4700 20132018 Analog Devices, Inc. All rights reserved. license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Technical Support www.analog.com Trademarks and registered trademarks are the property of their respective owners. 11719-001ADXL363 Data Sheet TABLE OF CONTENTS Device ID Registers .................................................................... 26 Features .............................................................................................. 1 Silicon Revision ID Register ..................................................... 26 Applications ....................................................................................... 1 X-Axis Data (8 MSB) Register .................................................. 26 General Description ......................................................................... 1 Y-Axis Data (8 MSB) Register .................................................. 26 Functional Block Diagram .............................................................. 1 Z-Axis Data (8 MSB) Register .................................................. 26 Revision History ............................................................................... 3 Status Register ............................................................................. 27 Specifications ..................................................................................... 4 FIFO Entries Registers ............................................................... 28 ADXL363 Specifications .............................................................. 4 X-Axis Data Registers ................................................................ 28 Accelerometer Specifications ...................................................... 4 Y-Axis Data Registers ................................................................ 28 Temperature Sensor Specifications ............................................ 5 Z-Axis Data Registers ................................................................ 28 12-Bit ADC Specifications .......................................................... 6 Temperature Data Registers ...................................................... 28 Absolute Maximum Ratings ............................................................ 7 ADC Data Registers ................................................................... 28 Thermal Resistance ...................................................................... 7 Soft Reset Register ...................................................................... 29 Recommended Soldering Profile ............................................... 7 Activity Threshold Registers ..................................................... 29 ESD Caution .................................................................................. 7 Activity Time Register ............................................................... 29 Pin Configuration and Function Descriptions ............................. 8 Inactivity Threshold Registers .................................................. 29 Typical Performance Characteristics ............................................. 9 Inactivity Time Registers ........................................................... 29 Theory of Operation ...................................................................... 14 Activity/Inactivity Control Register ........................................ 31 Accelerometer ............................................................................. 14 FIFO Control Register ............................................................... 32 ADC ............................................................................................. 15 FIFO Samples Register .............................................................. 33 Temperature Sensor ................................................................... 16 INT1/INT2 Function Map Registers ....................................... 33 Power Savings Features .................................................................. 17 Filter Control Register ............................................................... 35 Ultralow Power Consumption in All Modes, Operating All Sensors ......................................................................................... 17 Power Control Register ............................................................. 36 Motion Detection ....................................................................... 17 Self Test Register ......................................................................... 37 FIFO ............................................................................................. 19 Applications Information .............................................................. 38 Communications ........................................................................ 19 Application Examples ................................................................ 38 Additional Features ........................................................................ 20 Using External Timing .............................................................. 38 External Clock ............................................................................ 20 Power ............................................................................................ 39 Synchronized Data Sampling .................................................... 20 FIFO Modes ................................................................................ 40 Self Test ........................................................................................ 20 Interrupts ..................................................................................... 41 User Register Protection ............................................................ 20 Using Self Test ............................................................................. 42 Serial Communications ................................................................. 21 Operation at Voltages Other Than 2.0 V ................................ 43 SPI Commands ........................................................................... 21 Mechanical Considerations for Mounting .............................. 43 Multibyte Transfers .................................................................... 21 Axes of Acceleration Sensitivity ............................................... 44 Invalid Addresses and Address Folding .................................. 21 Layout and Design Recommendations ................................... 44 Latency Restrictions ................................................................... 22 Outline Dimensions ....................................................................... 45 Invalid Commands ..................................................................... 22 Ordering Guide .......................................................................... 45 Register Map .................................................................................... 25 Register Details ............................................................................... 26 Rev. A Page 2 of 45