Ultralow Power Digital Accelerometer - Analog Devices
Description
Data Sheet
3-Axis, ±2 g/±4 g/±8 g/±16 g Ultralow Power Digital Accelerometer
ADXL346
FEATURES
GENERAL DESCRIPTION
Ultralow power: as low as 23 μA in measurement mode and 0.
2 μA in standby mode at VS = 2.
6 V (typical)
Power consumption scales automatically with bandwidth User-selectable resolution
Fixed 10-bit resolution Full resolution, where resolution increases with g range,
up to 13-bit resolution at ±16 g (maintaining 4 mg/LSB scale factor in all g ranges) Embedded memory management system with FIFO technology minimizes host processor load Single tap/double tap detection Activity/inactivity monitoring Free-fall detection Concurrent four- and six-position orientation detection Supply and I/O voltage range: 1.
7 V to 2.
75 V SPI (3- and 4-wire) and I2C digital interfaces Flexible interrupt modes mappable to either interrupt pin Measurement ranges selectable via serial command Bandwidth selectable via serial command Wide temperature range (−40°C to +85°C) 10,000 g shock survival Pb free/RoHS compliant Small and thin: 3 mm × 3 mm × 0.
95 mm LGA package
APPLICATIONS
Handsets Medical instrumentation Gaming and pointing devices Industrial instrumentation Personal navigation devices Hard disk drive (HDD) protection
The ADXL346 is a small, thin, ultralow power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16 g.
Digital output data is formatted as 16-bit twos complement and is accessible through either an SPI (3- or 4-wire) or I2C digital interface.
The ADXL346 is well suited for mobile device applications.
It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock.
Its high resolution (4 mg/LSB) enables measurement of inclination changes of less than 1.
0°.
Several special sensing functions are provided.
Activity and inactivity sensing detect the presence or lack of motion by comparing the acceleration on any axis with user-set thresholds.
Tap sensing detects sin...
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