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Triple Axis Accelerometer Breakout - ADXL362 (SF SEN-11446)

The ADXL362 is a complete 3-axis acceleration measurement system that operates at extremely low power consumption levels. It measures both dynamic acceleration, resulting from motion or shock, and static acceleration, such as tilt. It's easy to communicate with the ADXL362 over SPI and built-in digital logic even enables autonomous operation for "wake-on-shake" operation.

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SEN-00134

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Sensor manufacturer: Analog Devices

Sensor Model Number: ADXL362

Breakout board manufacturer: Sparkfun

Sparkfun SKU: SEN-11446

 

Description

The ADXL362 is a complete 3-axis acceleration measurement system that operates at extremely low power consumption levels. It measures both dynamic acceleration, resulting from motion or shock, and static acceleration, such as tilt. It's easy to communicate with the ADXL362 over SPI and built-in digital logic even enables autonomous operation for "wake-on-shake" operation.


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 under sampling; 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.

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

Applications:

  • Hearing aids
  • Robotics
  • Motion enabled power save switches
  • Wireless sensors
  • Motion enabled metering devices
  • Game controllers

Documents:

Tutorials

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