ADI ADXL346ACCZ-RL7

The ADXL346 is a small, thin, ultralow power, 3- axis accelerometer with high resolution (13- bit) measurement at up to ± 16g. 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 (4mg / 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 single and double taps in any direction. Freefall sensing detects if the device is falling. Orientation detection is capable of concurrent four- and six- position sensing and a user- selectable interrupt on orientation change for 2D or 3D applications. These functions can be mapped individually to either of two interrupt output pins. An integrated memory management system with 32- level first in, first out (FIFO) buffer can be used to store data to minimize host processor activity and lower overall system power consumption. Low power modes enable intelligent motion- based power management with threshold sensing and active acceleration measurement at extremely low power dissipation. The ADXL346 is supplied in a small, thin, 3mm×3mm×0.95mm 16- lead, plastic package.

• Ultralow power: as low as 25μA in measurement mode and 0.2μA in standby mode at VS = 2.6V (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 ± 16g (maintaining 4mg / 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: 1.7V to 2.75V
• 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℃ to +85℃)
• 10,000g shock survival
• Pb free/RoHS compliant
• Small and thin: 3mm×3mm×0.95mm LGA package

• Handsets
• Medical instrumentation
• Gaming and pointing devices
• Industrial instrumentation
• Personal navigation devices
• Hard disk drive (HDD) protection