GY-45 MMA8451 3-Axis Accelerometer Module

GY-45 MMA8451 3-Axis Accelerometer Module is a low-power, high-resolution (14-bit) MEMS accelerometer that provides accurate acceleration measurements in three axes. Built around the Freescale MMA8451Q sensor, this module offers extensive embedded features including tap detection, free-fall detection, orientation detection, and more, making it ideal for wearable devices, motion tracking, and robotics applications.

Key Features:

• Three-Axis Sensing: Measures acceleration on X, Y, and Z axes with high accuracy.
• 14-bit Resolution: Offers precise data for detailed motion analysis.
• Wide Range Selection: ±2g, ±4g, and ±8g user-selectable ranges.
• Interrupt Support: Features programmable interrupt outputs for tap, freefall, motion events.
• Low Power Consumption: Ideal for battery-powered and portable devices.

Technical Specifications:

• Sensor: Freescale MMA8451Q
• Output: I2C Digital Output
• Resolution: 14-bit
• Selectable Ranges: ±2g, ±4g, ±8g
• Data Rate: 1.56 Hz to 800 Hz
• Operating Voltage: 1.95V – 3.6V
• Communication Protocol: I2C (Default address: 0x1D or 0x1C)
• Temperature Range: -40°C to +85°C

Mechanical Specifications:

• Module Type: GY-45 Breakout Board
• Dimensions: Approx. 15mm × 13mm
• Mounting: 4 through-hole pads for stable soldering
• Pin Headers: Included, but not soldered

Pinout and Wiring:

• VIN: Power input (3.3V recommended)
• GND: Ground
• SCL: I2C Clock
• SDA: I2C Data
• INT1 / INT2: Interrupt Outputs

Datasheet and Documentation:

• Download MMA8451Q Sensor Datasheet (PDF)

Applications:

• Wearable Devices: Fitness trackers, motion-based interfaces, pedometers.
• Mobile Phones: Orientation sensing, tilt detection.
• Robotics: Balance and navigation control.
• Gaming Controllers: Motion sensing in handheld devices.
• Industrial Equipment: Shock and vibration monitoring.

Equivalent Models:

• ADXL345: Digital accelerometer with I2C/SPI interface
• MMA8452Q: Slightly lower-cost version with fewer features
• LIS3DH: 3-axis accelerometer with ultra-low power

Package Includes:

• 1 x GY-45 MMA8451 3-Axis Accelerometer Module
• 1 x Male header strip (unsoldered)