ADXL345 3-Axis Accelerometer Tilt Angle Sensor

SKU: SMA-007
  • High Precision Sensing: Capable of measuring acceleration across 3 axes with 13-bit digital resolution, detecting subtle motion and orientation changes with exceptional accuracy.
  • Dual Communication Interfaces: Supports both IIC (I2C) and SPI transmission protocols, offering flexible integration with various microcontrollers and embedded systems like Arduino.
  • Low Power Consumption: Operates at ultra-low current levels (typically <40µA), making it ideal for battery-powered and energy-efficient applications such as wearables and IoT devices.
  • Wide Measurement Range: Configurable measurement ranges from ±2g to ±16g, allowing versatile use in different motion sensing scenarios from subtle tilts to high-impact movements.
  • Advanced Motion Detection: Integrated capabilities for tap detection, free-fall detection, and activity/inactivity monitoring, enabling sophisticated motion-triggered applications.

9,70

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Hello, fellow geeks!

I’m an embedded systems engineer with a degree in IoT Engineering, and I’ve been deeply involved in AIoT product development for years. I’ve participated in several B2B projects from the ground up — covering open-source hardwaresystem architecturehardware selection, and solution implementation.

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The ADXL345 is a small, thin, ultra-low power 3-axis accelerometer with high resolution (13 bits) and a measurement range of ±16g. The digital output data is 16-bit two’s complement format, which can be accessed through SPI (3-wire or 4-wire) or IIC digital interface;

The ADXL345 is suitable for mobile device applications. It can measure static gravitational acceleration in tilt detection applications, as well as dynamic acceleration due to motion or shock. It has high resolution (4mg/LSB) and is capable of measuring tilt changes of 0.25°. Using the ADXL345 digital output acceleration eliminates the need for digital-to-analog conversion, saving system cost and board area.

Features:

Chip used: ADXL345 (three-axis gravitational acceleration);

Communication method: IIC/SPI communication protocol;

Measuring range: ±2g~±16g;

Reserve IIC/SPI interface for easy access to other main control boards;

Application

  • Motion sensing
  • Gesture recognition
  • Tilt compensation
  • Vibration monitoring
  • Orientation detection

Specification

Supply Voltage DC3~5V
Supply Current 400uA
Output X, Y, Z
Working Temperature -40℃~85℃

Hardware Overview

PinMap

Pin Description
GND Power ground
VCC Power supply range DC3~5V
CS Chip Select
INT1 Interrupt 1
INT2 Interrupt 2
SDO SPI data output/IIC address setting
SDA SPI data I/O, IIC data line (compatible with 5V level)
SCL SPI clock line, IIC clock line (compatible with 5V level)

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