GY-291 ADXL345 3-Axis Accelerometer Module

DXL345 Tripple Axis Accelerometer Board is a small, thin, low power, 3-axis accelerometer with high resolution (13-bit) measurement at up to ±16g. Digital output data is format as 16-bit twos complement and is accessible through either a SPI (3- or 4-wire) or I2C digital interface.

The ADXL345 Tripple Axis Accelerometer Board is well suited for mobile device applications. It measures the static acceleration of gravity in tilt-sensing applications, as well as dynamic acceleration resulting from motion or shock. Its high resolution (4 mg/LSB) enables measurement of inclination changes less than 1.0°.

Several special sensing functions are provided. Activity and inactivity sensing detect the presence or lack of motion and if the acceleration on any axis exceeds a user-set level. Tap sensing detects single and double taps. Free-fall sensing detects if the device is falling. These functions can be mapped to one of two interrupt output pins. An integrated, patent-pending 32-level first in, first out (FIFO) buffer can be used to store data to minimize host processor intervention.

Low power modes enable intelligent motion-based power management with threshold sensing and active acceleration measurement at extremely low power dissipation.

Features of GY-291 ADXL345:

• GY-291 ADXL345 is a Small, Thin, Ultra-Low Power 3-axis Accelerometer with High Resolution (13 bits) and a Measurement Range of ± 16g
• GY-291 Sensor Digital Output Data is in 16-bit 2 Complement Format and is Accessible via SPI (3-wire or 4-wire) or I2C Digital Interface
• High Resolution: GY-291 ADXL345 Sensor Come with High Resolution (3.9 mg / LSB) Enables Measurement of tilt angle changes of less than 1.0 °
• Low-Power Mode: ADXL345 Sensor Supports Motion-Based Intelligent Power Management for Threshold Sensing and Motion Acceleration Measurement with Low Power Consumption
• Application: ADXL345 is Perfect for Mobile Device Applications, which can Measure Static Gravitational Acceleration in Tilt Detection Applications as well as Dynamic Acceleration Due to Motion or Impact

Specifications:

• Main Chip: ADXL345
• Model: GY-291
• Power Supply: 3-5V
• Means of Communication: IIC / SPI Communication Protocol
• Measuring Range: ±2g /±16g
• Digital-Output Triple-Axis Accelerometer with a Programmable Full-Scale Range of ±2g, ±4g, ±8g and ±16g and Integrated 16-bit ADCs
• Accelerometer Normal Operating Current: 450µA
• Ultralow Power: as low as 23 μA in Measurement Mode and 0.1 μA in Standby Mode at VS = 2.5 V (typical)
• Sleep Mode Current: 8µA
• Communication: SPI (3- and 4-wire) and I2C Digital Interfaces
• User-Programmable Interrupts
• Wake-On-Motion Interrupt for Low Power Operation of Applications Processor

Package Contents:

• 2x GY-291 ADXL345 3-Axis Digital Acceleration of Gravity Tilt Module
• 4x Pin Header