ADXL345 Triple Axis Linear Accelerometer Module

ADXL345 Triple Axis Linear Accelerometer Module is a compact and versatile sensor designed for precise motion detection and orientation measurement. Engineers and hobbyists use it in robotics, smartphones, wearable devices, and gaming controllers where low power consumption and high sensitivity matter.

Key Features:

• Triple-Axis Sensing: Measures acceleration along X, Y, and Z axes.
• High Resolution: Delivers up to 13-bit measurement with ±16 g sensitivity range.
• Low Power Operation: Consumes very little current, making it suitable for battery-powered devices.
• Flexible Data Output: Offers both SPI and I²C digital interfaces.
• Built-in Features: Includes tap, double-tap, free-fall, and activity/inactivity detection.
• Compact PCB Module: Easy to integrate with development boards and embedded systems.

Technical Specifications:

• Operating Voltage: 2.0 V to 3.6 V (typical 3.3 V)
• Current Consumption: ~23 µA in measurement mode, 0.1 µA in standby
• Measurement Range: Selectable ±2 g, ±4 g, ±8 g, ±16 g
• Resolution: Up to 13 bits
• Interface: I²C (up to 400 kHz) and SPI (up to 5 MHz)
• Output Data Rate: 0.1 Hz to 3200 Hz
• Operating Temperature: −40 °C to +85 °C

Mechanical Specifications:

• Module Type: Breakout PCB with soldered ADXL345 IC and passive components
• Connector: 5–8 pin header (depending on board variant)
• Assembly: Designed for through-hole or jumper wire connections
• Material: FR4 PCB with silkscreen labeling

Dimensions:

• Board Length: ~20 mm
• Board Width: ~15 mm
• Board Thickness: ~1.6 mm
• Pin Pitch: Standard 2.54 mm for breadboard compatibility

Pinout and Wiring:

• VCC: Power supply (3.3 V typical)
• GND: Ground
• SDA / SDI: Data line for I²C or SPI input
• SCL / SCLK: Clock line for I²C or SPI
• CS: Chip select for SPI (tie high for I²C mode)
• SDO: Data output pin (SPI or alternate I²C address select)
• Wiring Note: Connect VCC and GND to your power source, select communication mode with CS, and wire SDA/SCL or SDI/SCLK accordingly.

Datasheet Reference:

• ADXL345 datasheet

Applications:

• Robotics: Use for tilt sensing, navigation, and balance control.
• Wearables: Enable step counting, motion detection, and orientation tracking.
• Gaming Devices: Integrate into controllers for motion-based gameplay.
• Smartphones and Tablets: Support screen orientation and gesture recognition.
• Industrial Monitoring: Detect vibration and equipment movement for predictive maintenance.

Equivalent Models:

• ADXL335: Analog-output 3-axis accelerometer
• MPU-6050: 3-axis accelerometer with integrated gyroscope
• LIS3DH: Low-power digital-output accelerometer from STMicroelectronics

Package Includes:

• 1 x ADXL345 Triple Axis Linear Accelerometer Module