EVAL-ADXL345Z-M

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The EVAL-ADXL345Z-M evaluation board is one of the many evaluation boards (EVAL-board) produced by Analog Devices that are used to explore and evaluate an accelerometer’s advantages and limitations. An accelerometer is an instrument used to measure acceleration and vibration and, therefore, is a key component in a wide range of applications from automotive systems to medical devices. In this article, we will take a look at the EVAL-ADXL345Z-M, its application field and its working principle.

Overview

The EVAL-ADXL345Z-M evaluation board helps users to evaluate and understand the performance of a 3-axis digital MEMS (micro-electro-mechanical systems) accelerometer. This board is powered by the ADXL345, which is a low power, complete 3-axis accelerometer that can measure up to ±16 g. The ADXL345 can also take advantage of its 14-Bit resolution for better accuracy and offers a wide variety of streaming modes, power sources, and power-saving features to extend battery life. With the onboard regulator, the board can be powered with a single 3.6V lithium cell battery.

The board features a high-quality silicone-gel adhesive gasket that protects the MEMS accelerometer from outside dust or contaminants, and also provides improved shock protection. The board itself has four mounting holes and can be easily integrated into an application without the need of any soldering or complex wiring.

The side of the board features an evaluation header that allows the user to configure the accelerometer’s registers. This is the same type of header found on the EVAL-SDP-CB1Z, as well as other Analog Device’s evaluation boards. The board features two LED indicators, one for power and one for I2C communication, that indicate the status in the application.

Applications

The EVAL-ADXL345Z-M evaluation board is well suited for a variety of different applications. The board is a great choice for monitoring acceleration and vibration in applications. It is particularly useful in applications involving automotive safety, security systems, and in medical devices such as prosthetics and rehabilitation equipment.

The ADXL345 accelerometer is also great for applications involving human-machine interaction or gesture recognition. It can be used to control a game or track user movement and change the screen orientation accordingly. Given its relatively low power requirements, the ADXL345 is well suited for battery powered applications. Its on board accelerometers can be used to measure the tilt of the device. It is also popular for robotic applications, as it can detect shifts in orientation or acceleration.

Working Principle

The ADXL345 evaluation board works on the principle of capacitance. This means that, due to the presence of an applied voltage, an electric field is produced between two capacitors. When the board is subjected to acceleration, this electric field changes which, in turn, changes the capacitance and produces a measurable signal. The voltage of this signal is then converted into digital values and sent back to the board for further analysis.

The ADXL345 board uses the capacitance-change measurement principle, which makes the board ideal for a wide range of applications. This particular board also features a low-noise amplifier that allows for more accurate measurements even in high vibration environments. It also features power saving modes that allow for longer battery run-time.

Conclusion

The EVAL-ADXL345Z-M evaluation board is an ideal tool to evaluate the performance of a 3-axis digital MEMS accelerometer and its advantages and limitations. It is designed for applications involving acceleration and vibration, as well as for monitoring tilt angles or detecting shifts in acceleration or orientation. The ADXL345 board works on the principle of capacitance-change measurement which remains accurate even in high vibration environments. Its low power requirements also makes it ideal for battery powered applications. As such, the EVAL-ADXL345Z-M can be used in a wide range of applications, from automotive to medical devices.

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