4.31 €
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MMA7455 3-Axis Accelerometer Compatible with Arduino for Electronics Projects
Brand: satkit
4.31€
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The 3-axis MMA7455 accelerometer is a digital sensor designed for applications that require precise acceleration measurement in three dimensions. Compatible with Arduino, this device is perfect for electronics projects that need to detect changes in position, orientation and rapid movement.
This accelerometer offers adjustable sensitivity with ranges of ±2g, ±4g and ±8g, allowing it to be adapted to different measurement needs. Its digital output can be configured for communication via I2C or SPI interfaces, making integration with microcontrollers and embedded systems easier.
Among its standout features are low power consumption of just 400 µA, a low-pass filter to improve the signal, temperature compensation and a power-saving standby mode, ideal for battery-powered devices. It also includes a self-test for the Z axis and internal registers to calibrate the 0g offset, ensuring accurate measurements without the need for external components.
The MMA7455 can detect specific events such as free fall (0g) and single or double pulses, making it useful for applications that require motion recognition such as vibration, impact or sudden changes in position. Its INT1 and INT2 interrupt pins allow alerts to be configured for these events, making it easier to use in monitoring and control systems.
Key specifications:
- Configurable digital output: I2C or SPI
- Adjustable sensitivity: ±2g, ±4g, ±8g
- Low power consumption: 400 µA
- Operating voltage: 2.4 V to 3.6 V
- Low-pass filter and temperature compensation
- Self-test for the Z axis
- Registers for offset calibration
- Free-fall and pulse detection (rapid movement)
- Programmable threshold for interrupt output
- Standby mode for power saving
Typical uses:
- Arduino projects that require motion and orientation detection
- Portable devices that need low power consumption
- Vibration and impact monitoring systems
- Applications that require fall or sudden movement detection
This accelerometer is compatible with Arduino boards and can be easily integrated into projects via I2C or SPI connection, with support for configuring parameters according to the user's needs. Its compact and efficient design makes it an ideal choice for developers and electronics enthusiasts.
- Configurable I2C/SPI digital output for easy Arduino integration
- Adjustable sensitivity in three ranges: ±2g, ±4g, ±8g
- Low current consumption of just 400 µA, ideal for portable projects
- Low-pass filter and temperature compensation for accurate measurements
- Self-test for the Z axis to verify correct operation
- Operating voltage between 2.4 V and 3.6 V
- Internal registers for offset calibration without external components
- Free-fall and pulse detection for advanced applications
- Programmable threshold for INT1 or INT2 interrupt output
- Standby mode for power saving in battery-powered devices
Customer Questions & Answers
What are the main differences between the MMA7455 and other 3-axis accelerometers compatible with Arduino such as the ADXL345?
The MMA7455 stands out mainly for its low power consumption (400 μA typical in operation), its standby power-saving mode, and its programmable interrupt threshold. Compared with the ADXL345, the MMA7455 offers adjustable sensitivity in three ranges (±2g, ±4g, ±8g) and supports up to 125 samples/second versus 3200 Hz for the ADXL345. The ADXL345 offers higher resolution and a wider operating range, so the choice depends on the project’s precision, speed and power requirements.
What digital communication methods does the MMA7455 support, and what logic voltages does it require?
The MMA7455 supports digital communication via both I2C and SPI. It operates with logic levels from 2.4 V to 3.6 V, which means care must be taken with logic-level compatibility if connecting it to Arduino boards operating at 5 V.
What are the dimensions and weight of the MMA7455 module, and what is included in the box when buying it?
The standard MMA7455 module measures approximately 32 mm x 17 mm x 3 mm and weighs around 3 g. The package generally includes the sensor already mounted on the PCB and the corresponding pins for soldering or breadboard use; cables and a manual are usually not included, although this may vary by seller.
What tolerances and operating limits does the MMA7455 have regarding temperature and vibration?
The MMA7455 is specified to operate over a temperature range of -40 °C to +85 °C. Its nominal accuracy is guaranteed within this range. It is suitable for detecting vibrations and knocks within the ±2g, ±4g and ±8g ranges, but may saturate at higher accelerations. For applications subject to extreme vibrations or shocks above 8g, it is not recommended.
Is the MMA7455 accelerometer compatible with Arduino boards?
Yes, the MMA7455 accelerometer is compatible with Arduino boards and can be connected via I2C or SPI interfaces.
What sensitivity ranges does the MMA7455 offer?
It offers adjustable sensitivity in three ranges: ±2g, ±4g and ±8g, adapting to different applications.
Does the accelerometer have a power-saving mode?
Yes, it includes a standby mode that reduces consumption for battery-powered projects.
Can the sensor's 0g offset be calibrated?
Yes, the 0g offset can be recalibrated using the internal registers without the need for external components.
What types of movement can the MMA7455 detect?
It can detect vibration, free fall, impact and single or double pulses, useful for a range of applications.
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