AXDL345 , 3-Axis accelerometer with high resolution (13-bit)

4 years ago 1710
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Description

Product Details The ADXL345 Development Board is an easy-to-use tool designed to shorten application development time by providing a ready-to-use platform for data collection and firmware development.  The board is pre-configured as a datalogger that can be used to gather data for refining algorithms, tuning thresholds, and generally familiarizing oneself with accelerometer data. Powered by two AAA batteries, the board is completely untethered and integrates seamlessly into portable applications. Logged data is stored on a MicroSD memory card, providing essentially unlimited memory capacity and operating system versatility. Data is stored in a text (.txt) file, so no software installation is required to operate the board or read data. A 2GB MicroSD card and a USB MicroSD card reader are provided with the board. Additionally, the board is fully programmable, providing a hardware platform on which firmware can be tested in parallel with development of application hardware. A programming cable is provided with the board, and a development environment and header files are supplied on this page. Finally, the platform can be duplicated in the final application, having already been tested with the application firmware. Schematics and layout can be found under the Supporting Documentation tab and can be used freely in your application. Note that this board is not configured to display real-time data. For real-time evaluation of the ADXL345, please refer to the Inertial Sensor Evaluation Board. For a simple ADXL345 Breakout Board, ADXL345 Details: The ADXL345 is a small, thin, ultra low power, 3-axis accelerometer with high resolution (13-bit) measurement up to ±16 g. Digital output data is formatted as 16-bit twos complement and is accessible through either a SPI (3- or 4- wire) or I2C digital interface. The ADXL345 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 (4mg/LSB) enables resolution of inclination changes of as little as 0.25°. 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 interrupt output pins. An integrated 32 level FIFO 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.

Ultra low power Power consumption scales automatically with bandwidth User selectable fixed 10-bit resolution or 4mg/LSB scale factor in all g-ranges, up to 13-bit resolution at ±16 g 32 level output data FIFO minimizes host processor load Built in motion detection functions Tap/Double Tap detection Activity/Inactivity monitoring Free-Fall detection Supply and I/O voltage range: 1.8 V to 3.6 V (ADXL345) and 1.7 V to 2.75 V (ADXL346) SPI(3 and 4 wire) and I2C digital interfaces Flexible interrupt modes – Any interrupt mappable to either interrupt pin See data sheet for additional features

Documents

ADL345 Schematic

ADL345 Module PCB

BOM

ID Name Designator Footprint Quantity
1 ADXL345 U1 LGA14 1
2 SIP8 P1 HDR1X8 1
3 1k R1,R2 C0805 2
4 1u C1 C0805 1

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