The ADXL362BCCZ-MI-RL7 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 ADXL362BCCZ-MI-RL7 does not alias input signals by undersampling; it samples the full bandwidth of the sensor at all data rates.
The ADXL362BCCZ-MI-RL7 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 ADXL362BCCZ-MI-RL7 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 ADXL362BCCZ-MI-RL7 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 ADXL362BCCZ-MI-RL7 has provisions for external control of sampling time and/or an external clock.
The ADXL362BCCZ-MI-RL7 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 ADXL362BCCZ-MI-RL7 is available in a 3 mm × 3.25 mm × 1.06 mm package.
Feature
- Ultralow power
- Power can be derived from 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
- 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
- Small and thin 3 mm × 3.25 mm × 1.06 mm package
Applications
- Hearing aids
- Home healthcare devices
- Motion enabled power save switches
- Wireless sensors
- Motion enabled metering devices
(Picture: Pinout)
