PA81J

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The PA81J is a linear amplifier in the instrumentation family of operational-amplifiers, buffers and amplifiers. This instrumentation device is used in a variety of applications and is often used to drive high-powered output devices. Its dual-channel design allows for the control of audio signals and voltage ranges, making it one of the most versatile amplifiers in its class.

The PA81J is capable of operating in both single-ended and differential configurations. It consists of two input amplifiers and an output amplifier, which can be configured in a variety of ways to accommodate different applications. The input amplifiers are designed to operate over a wide range of frequencies, while the output amplifier provides up to ±12V output levels and can drive up to 4A continuous maximum output current.

The most common application of the PA81J is in power control circuits. It is designed to provide precision gain control over a wide range of load currents, making it ideal for applications such as DC motor control, compressors, lighting and audio power amplifiers. It is also well suited for use in analog signal processing circuits due to its low distortion, high signal-to-noise ratio and good voltage regulation.

The working principle of the PA81J is simple. It is a two-stage, direct-coupled operational amplifier (opamp) used to amplify the input signal. The input signal is applied to one of the two inputs of the opamp and the output of the two inputs is then amplified. The output of the amplifier is then used to drive the output device. The amount of gain provided by the amplifier is set by the external circuitry that is connected to the amplifier.

The PA81J is typically used in applications that require power control and high-powered output. It is designed to operate with a wide range of load currents and can provide precise voltage regulation. Additionally, it provides excellent signal-to-noise ratio and low distortion. The PA81J is an ideal choice for a variety of applications, including power control and audio power amplifiers.

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