ADXL335 3-Axis Analogue Output Accelerometer – High-Precision Motion and Tilt Sensor for Arduino, Raspberry Pi, and Robotics

Product Description The ADXL335 is a complete, small, low-profile 3-axis accelerometer with signal-conditioned voltage outputs. This module measures acceleration with a minimum full-scale range of ±3g, making it ideal for sensing static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion, shock, or vibration. Unlike digital accelerometers, the ADXL335 provides three separate analog voltages for the X, Y, and Z axes, allowing for direct interfacing with the ADC (Analog-to-Digital Converter) of an Arduino or other microcontrollers without the need for complex library protocols. It is a favorite for flight stabilization, gaming controllers, and robotic balance systems.

Key Features

• 3-Axis Sensing: Simultaneously measures tilt and motion in X, Y, and Z planes for comprehensive spatial awareness.

• Direct Analog Output: Provides a simple voltage-per-g output, making it compatible with any microcontroller that has analog input pins.

• Ultra-Low Power Consumption: Consumes only 350 µA, which is significantly lower than most digital counterparts, extending battery life in IoT nodes.

• High Shock Survival: The MEMS sensor is designed to survive mechanical shocks up to 10,000g, ensuring durability in high-impact projects.

• Integrated Signal Conditioning: Features on-board low-pass filtering and amplification to deliver a clean, stable signal directly to the output pins.

Technical Details

• Sensing Principle: Employs a polysilicon surface-micromachined structure and a differential capacitor to detect movement.

• Sensitivity Calibration: Factory-calibrated to 300 mV/g at 3V supply, providing high accuracy right out of the box.

• Zero-g Offset: Typically centered at VCC/2, allowing the sensor to detect both positive and negative acceleration.

• Adjustable Bandwidth: Users can adjust the bandwidth of each axis by changing the capacitors on the Xout, Yout, and Zout pins (default set for 50Hz).

• Wide Supply Range: Includes an on-board 3.3V LDO regulator, making it safe to power from 3.3V or 5V rails.

• MEMS Durability: Features a monolithic silicon design for superior temperature stability and reliability over time.

• Output Impedance: Typical output resistance of 32 kΩ ensures minimal signal loss when connected to standard ADC inputs.

• Environmental Stability: Maintained performance across the industrial temperature spectrum, ideal for outdoor drone or automotive use.

• Resolution: Being an analog device, the resolution is limited only by the bit-depth of the microcontroller's ADC (e.g., 10-bit on Arduino).

• EMC Robustness: Designed to minimize electromagnetic interference, essential for use near high-frequency radio modules.

• Cross-Axis Sensitivity: Minimal interference between axes (typically ±1%) for precise tilt calculations.

• PCB Quality: Manufactured on a double-sided FR-4 PCB with gold-plated pads for long-term corrosion resistance.

• Pin Configuration: VCC, GND, X-Out, Y-Out, and Z-Out.

• Miniature Footprint: Lightweight and small enough to be mounted at the center of gravity on robotic arms or UAV frames.

• Logic Level Compatibility: Safe for use with 3.3V (Raspberry Pi/ESP32) and 5V (Arduino Uno/Mega) logic systems.