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MMA8491QR2
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MMA8491QR2

Product Overview

The MMA8491QR2 is a 3-axis accelerometer sensor belonging to the category of motion sensing devices. It is commonly used in various applications such as orientation detection, gesture recognition, and vibration monitoring. The sensor exhibits characteristics of high sensitivity, low power consumption, and small package size. It is typically available in a surface-mount package and is essential for accurately detecting changes in acceleration. The packaging usually consists of a quantity of one sensor per package.

Specifications

  • Supply Voltage: 1.95V to 3.6V
  • Current Consumption: 400 µA
  • Output Data Rate: 1.56 Hz to 800 Hz
  • Operating Temperature Range: -40°C to +85°C
  • Sensitivity: ±8g

Detailed Pin Configuration

The MMA8491QR2 features a total of 16 pins, including VDD, GND, I2C interface pins, and interrupt pins. The detailed pin configuration is as follows: 1. VDD 2. INT1 3. INT2 4. SDA 5. SCL 6. GND 7. XOUT 8. YOUT 9. ZOUT 10. NC 11. NC 12. NC 13. NC 14. NC 15. NC 16. NC

Functional Features

The MMA8491QR2 offers the following functional features: - High-resolution motion detection - Low-power mode for energy efficiency - I2C digital output interface for easy integration - Configurable interrupt pins for event-driven applications

Advantages and Disadvantages

Advantages

  • High sensitivity for accurate motion detection
  • Low power consumption for extended battery life
  • Small package size for space-constrained designs

Disadvantages

  • Limited measurement range compared to some other accelerometers
  • Sensitive to external vibrations and noise

Working Principles

The MMA8491QR2 operates based on the principle of capacitive micro-machined accelerometer (CMA) technology. It utilizes a micro-electromechanical system (MEMS) structure to detect changes in capacitance due to acceleration forces. These changes are then converted into digital signals for further processing.

Detailed Application Field Plans

The MMA8491QR2 finds extensive application in various fields, including: - Consumer electronics for screen orientation and gesture control - Industrial equipment for vibration monitoring and impact detection - Automotive systems for tilt and inclination sensing - Wearable devices for activity tracking and gesture recognition

Detailed and Complete Alternative Models

Some alternative models to the MMA8491QR2 include: - MMA8452QR1: A similar 3-axis accelerometer with lower sensitivity but wider temperature range - LIS3DH: Another 3-axis accelerometer with higher measurement range and lower power consumption

In conclusion, the MMA8491QR2 is a versatile 3-axis accelerometer sensor with high sensitivity and low power consumption, making it suitable for various motion sensing applications across different industries.

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Lista 10 Vanliga frågor och svar relaterade till tillämpningen av MMA8491QR2 i tekniska lösningar

  1. What is the MMA8491QR2 accelerometer used for?

    • The MMA8491QR2 accelerometer is used to measure acceleration in various technical solutions, such as motion detection, tilt sensing, and vibration monitoring.

  2. What is the operating voltage range of the MMA8491QR2?

    • The operating voltage range of the MMA8491QR2 is 1.95V to 3.6V.

  3. How can I interface with the MMA8491QR2?

    • The MMA8491QR2 can be interfaced using I2C or SPI communication protocols.

  4. What is the resolution of the MMA8491QR2 accelerometer?

    • The MMA8491QR2 has a resolution of 14 bits.

  5. Can the MMA8491QR2 be used for impact detection?

    • Yes, the MMA8491QR2 can be used for impact detection due to its high sensitivity to acceleration changes.

  6. Is the MMA8491QR2 suitable for battery-powered applications?

    • Yes, the low operating voltage range makes the MMA8491QR2 suitable for battery-powered applications.

  7. What is the measurement range of the MMA8491QR2?

    • The MMA8491QR2 has a selectable measurement range of ±2g, ±4g, or ±8g.

  8. Does the MMA8491QR2 have built-in motion detection features?

    • Yes, the MMA8491QR2 has built-in motion detection capabilities that can be configured for specific applications.

  9. Can the MMA8491QR2 be used for orientation detection?

    • Yes, the MMA8491QR2 can be used for orientation detection and tilt sensing applications.

  10. Are there any application notes or reference designs available for the MMA8491QR2?

    • Yes, NXP provides application notes and reference designs to help users implement the MMA8491QR2 in their technical solutions effectively.