AD8556ACPZ-REEL

The AD8556ACPZ-REEL is a Rail-to-Rail input and output operational amplifier (RRIO) belonging to the family of amplifier types classified as linear. The device is part of the high fidelity audio power amplifier portfolio and is intended for use in applications such as instrumentation, precision filters, and audio signal processing. In this article we discuss the application field and working principle of the AD8556ACPZ-REEL.

Application Field of AD8556ACPZ-REEL

The AD8556ACPZ-REEL is a low noise, high accuracy RRIO operational amplifier. It is designed for use in precision, linear, and audio applications. The device features low noise – it has a negligible effect on the original audio when performing AC coupling, level shifting, or mixing. The device also features a low distortion level of 0.0004% THD ensuring accurate reproduction of the music. The RRIO amplifiers are designed to drive 2 to 4 ohm loads, or loudspeakers with RMS currents up to 6 Amps.

The AD8556ACPZ-REEL is suitable for use in instrumentation systems. Its low noise performance ensures that unwanted noise signals do not interfere with the accurate measurement of signals. Furthermore, its high bandwidth and high slew rate of 20V/µs makes it ideal for use in active filter applications, as it can accurately track and amplify fast signals with minimal delay.

In addition, the AD8556ACPZ-REEL is also suitable for use in audio power amplifier application, as it is capable of providing high levels of linearity and performance in the audio band. The device offers low distortion levels and can provide high power over a wide range of frequencies.

Working Principle of AD8556ACPZ-REEL

The AD8556ACPZ-REEL is a low impedance, rail-to-rail input and output operational amplifier. It is designed for use in applications requiring low noise and low distortion levels, such as instrumentation, audio signal processing and high fidelity audio power amplifier. The device has a wide power bandwidth of 4 Hz to 5 MHz.

The device operates from a single 5V power supply and requires an output voltage swing of up to +/- 4V. The AD8556ACPZ-REEL employs RRIO architectures to achieve near perfect rail-to-rail input and output signals. This operation is possible thanks to the high voltage open-loop follower topology of the amplifier, where the input stage generates a current in response to the input signal, and the output stage is used to amplify the current generated in the input stage. The input stage consists of two cascaded input transistors, while the output stage consists of two complementary emitter followers.

The AD8556ACPZ-REEL also has output current limiting protection. This feature prevents overload caused by short circuits and high current loads, ensuring both reliable operation and good power efficiency. This also works to maintain linearity, ensuring accurate signal reproduction.

Conclusion

In conclusion, the AD8556ACPZ-REEL is a low noise, low distortion Rail-to-Rail input and output operational amplifier from the linear family of amplifiers. It is suitable for use in applications such as instrumentation, precision filters, and high fidelity audio power amplifier. The device utilizes RRIO architectures to achieve near perfect rail-to-rail input and output signals, as well as offering protection against overloads.