The AD603ARZ is a Special Purpose Amplifiers IC 90 MHz VARIABLE GAIN AMP manufactured by Analog Devices. This IC provides both balanced line drivers and differential variable gain amplifiers, which can be used to construct a wide range of audio signal processing systems. The IC is well-suited for use in a variety of automotive audio, industrial, commercial, and consumer applications. The AD603ARZ provides differential input and output stage architecture, along with an internal voltage reference to ensure excellent linearity and dynamic range. Additionally, adjustable gain and output current range, current limiting, and soft-start protection allow for superior audio signal processing performance.