ADXL345 3-Axis Accelerometer/Gravity/Angle Sensor

The ADXL345 is a small, thin, low-power 3-axis accelerometer, ideal for mobile device applications. It can measure static gravitational acceleration in tilt detection applications, as well as dynamic acceleration resulting from motion or shock. When using digital output accelerometers like the ADXL345, there is no need for analog-to-digital conversion, saving system cost and board space. The low power mode supports motion-based intelligent power management, enabling threshold sensing and motion acceleration measurement at extremely low power consumption.

Product Description

GY-291 ADXL345 Digital 3-Axis Gravity Acceleration Tilt Module IIC/SPI Transmission

The ADXL345 is a small, thin, low-power 3-axis accelerometer, ideal for mobile device applications. It can measure static gravitational acceleration in tilt detection applications, as well as dynamic acceleration resulting from motion or shock. When using digital output accelerometers like the ADXL345, there is no need for analog-to-digital conversion, saving system cost and board space. The low power mode supports motion-based intelligent power management, enabling threshold sensing and motion acceleration measurement at extremely low power consumption.

Features

• Control Chip: ADXL345
• Power Supply: 3 ~ 5V
• Communication Protocol: IIC/SPI
• Measurement Range: Up to ±16g, Resolution: 13-bit (4 mg/LSB), capable of measuring tilt changes of approximately 0.25°
• Digital Output: 16-bit Two's Complement Format
• 3-Axis: ± 2g, ± 4g, ± 8g, ± 16g
• Connectable via SPI (3-wire or 4-wire) or I2C digital interface
• Provides multiple special detection features; activity and inactivity detection functions by comparing acceleration on any axis with user-set thresholds to detect motion
• Tap detection function can detect single and double tap actions in any direction; free-fall detection function can detect if the device is falling
• These functions can be independently mapped to one of the two interrupt output pins
• 90-degree header pins included, soldering required

The ADXL345 is ideal for mobile device applications. It can measure static gravitational acceleration in tilt detection applications, as well as dynamic acceleration resulting from motion or shock. It has a high resolution (4 mg/LSB), capable of measuring tilt changes of approximately 0.25°. When using digital output accelerometers like the ADXL345, there is no need for analog-to-digital conversion, saving system cost and board space. Additionally, the ADXL345 is a small, thin, ultra-low power 3-axis accelerometer with high resolution (13-bit) and a measurement range of up to ±16g. The digital output data is in 16-bit two's complement format and is accessible via SPI (3-wire or 4-wire) or I2C digital interface. The ADXL345 is ideal for mobile device applications, capable of measuring static gravitational acceleration in tilt detection applications, as well as dynamic acceleration resulting from motion or shock, with a high resolution (3.9 mg/LSB), capable of measuring tilt changes of less than 1.0°.

This device provides multiple special detection features. Activity and inactivity detection functions detect motion by comparing acceleration on any axis with user-set thresholds. The tap detection function can detect single and double tap actions in any direction. The free-fall detection function can detect if the device is falling. These functions can be independently mapped to one of the two interrupt output pins. The patent-pending integrated memory management system uses a 32-level FIFO buffer to store data, reducing host processor load and overall system power consumption.

The low power mode supports motion-based intelligent power management, enabling threshold sensing and motion acceleration measurement at extremely low power consumption. The ADXL345 is available in a small, thin, 3 mm × 5 mm × 1 mm, 14-lead plastic package.