ADXL362 Datasheet | Analog Devices

TURES - Ultra low 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 n A motion activated wake-up mode - 10 n A 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 microcon- troller intervention, to allow the rest of the system to be turned off pletely - 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 mand - 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 FUNCTIONAL BLOCK DIAGRAM GENERAL DESCRIPTION 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 n A 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 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...