ADXL362 MEMS Accelerometer

By Analog Devices Inc 282

ADXL362 MEMS Accelerometer

Analog Devices' 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 provides 12-bit output resolution, and 8-bit formatted data provides 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.

  • Built-in features for system-level power savings:
    • Adjustable threshold sleep/wake modes for motion activation
    • See data sheet for additional features
  • 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
  • Measurement ranges selectable via SPI command
  • Small, thin 3 mm × 3.25 mm × 1.06 mm package
  • Ultra-low power
    • High resolution: 1 mg/LSB
    • Power can be derived from a coin cell battery
    • 1.8 μA at 100 Hz ODR, 2.0 V supply; 3.0 μA at 400 Hz ODR, 2.0 V supply
    • 270 nA motion activated wake-up mode
    • 10 nA standby current
  • On-chip temperature sensor
  • SPI digital interface

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