New Ultralow Power Three-axis MEMS Accelerometer for Healthcare Apps
The Analog Devices ADXL367 reduces power consumption by two, together with a 30 percent improvement in noise performance
Analog Devices has released a new three-axis MEMS accelerometer designed for a wide range of healthcare and industrial applications, including vital signs monitoring, hearing aids, and motion-enabled metering devices. The Analog Devices ADXL367 accelerometer improves power consumption by two times versus an earlier generation of the device (ADXL362) while improving noise performance by up to over 30 percent. The new accelerometer also provides extended field time that maximizes battery life and reduces maintenance frequency and cost.

The Analog Devices ADXL367 consumes only 0.88 µA at a 100 Hz output data rate and 180 nA when in motion-triggered wake-up mode. Unlike accelerometers that use power duty cycling to achieve low power consumption, the ADXL367 does not alias input signals by undersampling but rather samples the full bandwidth of the sensor at all data rates.
Features of the ADXL367 Three-axis MEMS Accelerometer
- Supply voltage range
- Single-cell battery operation: 1.1 V to 3.6 V
- Internal power supply regulation for high PSRR
- Ultralow power
- 0.89 µA at 100 Hz ODR, 2.0 V supply
- 180 nA motion activated wake-up mode
- 40 nA standby current
- High resolution: 0.25 mg/LSB
- Built-in features for system level power savings
- Single-tap and double-tap detection with only 35 nA of added current
- Adjustable threshold sleep and wake-up 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 512 sample embedded FIFO minimizes host processor load
- Awake state output enables implementation of motion activated switch
- Acceleration sample synchronization via external trigger
- Low noise to 170 µg/√Hz
- On-chip temperature sensor
- Internal two-pole antialias filter
- SPI (4-wire) and I²C digital interfaces
For more information on the ADXL367 Three-axis MEMS Accelerometer, visit the Analog Devices website at Analog Devices ADXL367 product page.
The Analog Devices website address is www.analog.com
[Reprinted with kind permission from Analog Devices - Release Date, 2nd May, 2022]