MMA8652FCR1 Sensors, Transducers

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1. Describe

The MMA8652FC is an intelligent, low-power, three-axis, capacitive micromachining The accelerometer has 12-bit resolution. Accelerometer equipped Embedded functions with flexible user programmable options, configurable as two interrupt pin. Embedded interrupt capability enables overall power savings, through Frees the host processor from continuously polling for data. have access Low-pass or high-pass filter data to minimize data analysis Need shock detection and faster transitions. The device can be configured as Generate inertial wake-up interrupts from any combination Configurable embedded functions enable MMA8652FC to monitor inertia Event to remain in low power mode during periods of inactivity. This The MMA8652FC is available in a small 10-pin DFN package (2 mm x 2 mm x 1 mm).

2. Feature

    1. 1.95 V to 3.6 V supply voltage

    2. 1.62 V to 3.6 V digital interface voltage

    3. ±2 g, ±4 g and ±8 g dynamically selectable full-scale ranges

    4. 1.56 Hz to 800 Hz output data rate (ODR)

    5. 12-bit digital output

    6. I2C digital output interface with programmable interrupts

    7. Four embedded configurable motion detection channels (free fall, motion, pulse, transient)

    8. Orientation (portrait/landscape) detection with programmable hysteresis

    9. Configurable automatic ODR changes triggered by Auto-Wake/Sleep state changes

  10. 32-sample FIFO

  11. High pass filter data per sample and available via FIFO

  12. Self-test

3. Application

    1. Tilt compensation in electronic compass applications

    2. Static orientation detection

    3. Laptop, tablet, e-reader, and notebook rollover and free fall detection

    4. Real-time orientation detection

    5. Real-time activity analysis:

        - Pedometer step counting

        - HDD free fall detection

        - dead reckoning GPS backup

    6. Motion detection for power saving in portable products:

        - Auto-sleep and auto-wake for cell phones

        - PDAs

        - GPS

        - games

    7. Shock and vibration monitoring

    8. User Interface

4. Pin configuration

5. Pin Description

6. Functionality

    1. 8-bit or 12-bit data, high-pass filtered data, 8-bit or 12-bit configurable 32-sample FIFO

    2. Four different oversampling options that allow for the optimum resolution vs. current consumption trade-off to be made for a given application

    3. Low-power and auto-WAKE/SLEEP modes for reducing current consumption

    4. Single/double tap with directional information (one channel)

    5. Motion detection with directional information or Freefall (one channel)

    6. Transient/jolt detection based on a high-pass filter, with a settable threshold for detecting the change in acceleration above a threshold with directional information (one channel)

    7. Flexible user-configurable portrait landscape detection algorithm, for addressing screen orientation

    8. Two independent interrupt output pins that are programmable among seven interrupt sources