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  • Accelerometers

    An accelerometer is an electromechanical device that will measure acceleration forces. These forces may be static, like the constant force of gravity pulling at your feet, or they could be dynamic which is caused by moving or vibrating the accelerometer.


    Some accelerometers use the piezoelectric effect in which they contain microscopic crystal structures that get stressed by accelerative forces, which causes a voltage to be generated. Another way to do is by sensing changes in capacitance. If you have two microstructures next to each other, they have a certain capacitance between them. If an accelerative force moves one of the structures, then the capacitance will change. Add some circuitry to convert from capacitance to voltage and you will get accelerometer.


    Accelerometer can produce either analog or digital outputs. Analog style accelerometers output a continuous voltage that is proportional to acceleration. e.g 2.5V for 0g, 2.6V for 0.5g, 2.7V for 1g. Digital accelerometers usually use pulse width modulation (PWM) for their output. This means there will be a square wave of a certain frequency, and the amount of time the voltage is high will be proportional to the amount of acceleration.


    There are two common types of accelerometer, the seismic mass type and the piezoelectric accelerometer. The seismic mass type accelerometer is based on the relative motion between a mass and the supporting structure. The natural frequency of the seismic mass limits its use to low to medium frequency applications. The piezoelectric accelerometer, however, is compact and more suitable for high frequency applications.


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    MMA8451QT
    MMA8451QT - MEMS Accelerometer, Digital, X, Y, Z, ± 2g, ± 4g, ± 8g, 1.95 V, 3.6 V, QFN

    84R7351

    MEMS Accelerometer, Digital, X, Y, Z, ± 2g, ± 4g, ± 8g, 1.95 V, 3.6 V, QFN

    NXP

    3-AXIS 14 BIT ACCELEROMETER 2G/4G/8G, QFN-16; MEMS SENSOR OUTPUT:DIGITAL; MEASUREMENT AXIS:X, Y, Z; ACCELERATION RANGE:± 2G, ± 4G, ± 8G; SUPPLY VOLTAGE MIN:1.95V; SUPPLY VOLTAGE MAX:3.6V; SENSOR CASE STYLE:QFN; NO. OF PINS:16PINS ROHS COMPLIANT: YES

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    MPU-6050
    MPU-6050 - MEMS Module, MotionTracking Series, 3-Axis Gyroscope/Accelerometer, ±16g, 2.375 V to 3.46 V, QFN-24

    37T8113

    MEMS Module, MotionTracking Series, 3-Axis Gyroscope/Accelerometer, ±16g, 2.375 V to 3.46 V, QFN-24

    INVENSENSE

    GYROSCOPE/ACCELEROMETER, MEMS, 3AXIS, QFN-24; MEMS Module Function:Tri-Axis Gyroscope, Tri-Axis Accelerometer; Supply Voltage Min:2.375V; Supply Voltage Max:3.46V; Sensor Case Style:QFN; No. of Pins:8Pins; Product Range:- RoHS Compliant: Yes

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    MMA8451QR1
    MMA8451QR1 - MEMS Accelerometer, 3-Axis, Digital, X, Y, Z, ± 2g, ± 4g, ± 8g, 1.95 V, 3.6 V, QFN

    84R7350

    MEMS Accelerometer, 3-Axis, Digital, X, Y, Z, ± 2g, ± 4g, ± 8g, 1.95 V, 3.6 V, QFN

    NXP

    ACCELEROMETER 3-AXIS, 14 BIT, 2G/4G/8G, QFN-16; MEMS Sensor Output:Digital; Measurement Axis:X, Y, Z; Acceleration Range:± 2g, ± 4g, ± 8g; Supply Voltage Min:1.95V; Supply Voltage Max:3.6V; Sensor Case Style:QFN; No. of Pins:16Pins RoHS Compliant: Yes

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    LSM303DLH
    LSM303DLH - IC, DIGITAL COMPASS, ±2g ±4g ±8g, LGA-28

    71R6476

    IC, DIGITAL COMPASS, ±2g ±4g ±8g, LGA-28

    STMICROELECTRONICS

    IC, DIGITAL COMPASS, ±2g ±4g ±8g, LGA-28; Acceleration Range:± 2g, ± 4g, ± 8g; No. of Axes:3; IC Interface Type:I2C, Serial; Sensor Case Style:LGA; No. of Pins:28; Supply Voltage Range:2.5V to 3.3V RoHS Compliant: Yes

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    LSM6DS3TR
    LSM6DS3TR - CONSUMER MEMS

    41Y5544

    CONSUMER MEMS

    STMICROELECTRONICS

    CONSUMER MEMS

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