AD8397AR-EBZ

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The AD8397AR-EBZ evaluation board is a useful tool for both experienced professionals and those new to the field of operational amplifiers. It offers a simplified, efficient way to learn about the complexities of these particular amplifiers, and to determine their capabilities and limitations in different applications. In this article, we will provide an overview of the board, discuss its main features, and explore its application field and working principles.

Overview

The AD8397AR-EBZ evaluation board is a vertical, dual-channel amplifier device developed by Analog Devices, Inc. It is designed to provide stable, efficient power amplification in a wide variety of test applications, including audio amplifiers, transducer preamplifiers, digital-to-analog converters (DACs) and low-frequency integrated circuits (ICs). It has a wide range of operating conditions, including 55V to 90V supply voltage and 140 mA to 200 mA current ratings.

Features

The board has an impressive list of features which make it a highly versatile platform for evaluating power amplifiers. Firstly, it is built with an improved version of Analog Devices’ AD8397 op amp, which offers a power output of up to 100W and THD+N performance of 0.02%. This is accompanied by a low-noise design, with a typical noise floor of -122dBu. Additionally, the board offers a wide range of gain settings, from 0 to 10V/V, with adjustable low-pass, high-pass and gain controls.

Both channels have independently adjustable input impedance, which can be set to 10k Ω or 1M Ω. The board also features an adjustable offset null control, which is useful for aligning the two channels for optimum performance. Another notable feature is the EMI filter that is included to reduce interference from external sources. Finally, the board has a range of protection circuits built-in, including input current limiting, thermal shut-down and reverse-polarity protection.

Application field and working principle

The AD8397AR-EBZ evaluation board is an excellent tool for evaluating power amplifiers in a wide range of applications. The board can be used for testing audio amplifiers, transducer preamplifiers, low-frequency ICs, video amplifiers, and DACs. Additionally, the board can be used to determine the maximum power output of an amplifier as well as its distortion performance.

The AD8397 op amp at the heart of the board is an integrated circuit composed of several transistors and resistors which amplify an input signal. Using the board’s adjustable controls, users can adjust the gain, offset, and low-pass, high-pass filters to suit their application. By doing so, they can determine the maximum output power of the device and its distortion performance.

The board also includes a range of protection circuits, including a temperature shut-down circuit, which prevents the device from overheating and damaging the amplifier. Additionally, the reverse-polarity protection circuit prevents damage to the board if it is connected to a power supply with the wrong polarity. Finally, the EMI filter reduces the interference from external sources and helps achieve better overall performance.

Conclusion

The AD8397AR-EBZ evaluation board is a useful tool for both professionals and hobbyists. It provides an efficient, simplified way of learning about operational amplifiers and testing them in a range of applications. Its impressive list of features, including adjustable gain, offset and filter controls, and a range of protection circuits, make it an ideal platform for evaluating amplifiers. Its application field includes audio and video amplifiers, transducer preamplifiers, low-frequency ICs, and DACs. By understanding its working principles, users can get the most out of their amplifier evaluation.

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