ADXL345BCCZ-RL7 Sensors, Transducers

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1. DESCRIPTION

The  ADXL345BCCZ-RL7 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 a SPI (3- or 4-wire) or I2C digital interface. The  ADXL345BCCZ-RL7 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 (3.9 mg/LSB) enables measurement of inclination changes 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. These functions can be mapped individually to either of two interrupt output pins. An integrated memory management system with a 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  ADXL345BCCZ-RL7 is supplied in a small, thin, 3 mm × 5 mm × 1 mm, 14-lead, plastic package.

2. FEATURES

    1. Ultralow power: as low as 23 µA in measurement mode and 0.1 µA in standby mode at VS = 2.5 V (typical) 

    2. Power consumption scales automatically with bandwidth

    3. User-selectable resolution

        - Fixed 10-bit resolution

        - Full resolution, where resolution increases with g range, up to 13-bit resolution at ±16 g

    4. Embedded memory management system with FIFO technology minimizes host processor load

    5. Single tap/double tap detection

    6. Activity/inactivity monitoring

    7. Free-fall detection

    8. Supply voltage range: 2.0 V to 3.6 V

    9. I/O voltage range: 1.7 V to VS

  10. SPI (3- and 4-wire) and I2C digital interfaces

  11. Flexible interrupt modes mappable to either interrupt pin

  12. Measurement ranges selectable via serial command

  13. Bandwidth selectable via serial command

  14. Wide temperature range (−40°C to +85°C)

  15. 10,000 g shock survival

  16. Pb free/RoHS compliant

  17. Small and thin: 3 mm × 5 mm × 1 mm LGA package 

3. APPLICATIONS

    1. Handsets

    2. Medical instrumentation

    3. Gaming and pointing devices

    4. Industrial instrumentation

    5. Personal navigation devices

    6. Hard disk drive (HDD) protection