MMA6813KWR2

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Accelerometers are a type of motion sensors that are used to measure acceleration, vibration, and tilt. The MMA6813KWR2 is an example of an accelerometer that is commonly used in the consumer and automotive markets. In this article, we will discuss the application field and working principle of the MMA6813KWR2.

The MMA6813KWR2 is designed to detect acceleration in three orthogonal directions: x, y, and z. It offers a range of -3 g to +3 g (3g = 9.8 m/s), meaning that it can measure accelerations up to 9.8 m/s2. It has a high resolution of 1mg/LSBs (least significant bit) and a minimum sensing voltage of 0.5V, which means that it can sense changes as small as 0.5V. The MMA6813KWR2 is also designed for high shock survivability of up to 10,000 g.

The MMA6813KWR2 is typically used for automotive applications such as airbag deployment and vehicle rollover detection. It can also be used in consumer products, such as tablets and motion sensing game controllers. In addition, it can be used in aerospace and industrial applications to measure acceleration and vibration.

The MMA6813KWR2 accelerometer operates on the principle of an electrically charged plate suspended by two columns. This arrangement is known as a "traditional variable capacitor," or VFC. As the VFC accelerates along one axis, the plate\'s charge is altered due to the relative motion between the plate and the columns. This change in charge is measured by a built-in integrated circuit, and is reported by the output voltage of the device.

The MMA6813KWR2 is an analog device, meaning that the output voltage corresponds to the measured acceleration. The output range of the device is typically between 0 and 3 volts. The output voltage can be used in a variety of ways, such as in a direct voltage control circuit or a low-pass filter. Additionally, an analog-to-digital (A/D) converter can be used to convert the analog signal into a digital signal, which can then be used in microcontrollers or other digital systems.

In conclusion, the MMA6813KWR2 is a three-axis acceleration sensor designed for automotive, consumer, aerospace, and industrial applications. It has a range of -3 g to +3 g, a high resolution of 1mg/LSBs, and a low sensing voltage of 0.5V. The accelerometer operates on the principle of a traditional variable capacitor, and its analog output voltage is typically used in voltage control or digital systems.

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