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Audio Special Purpose

The PGA2311UAG4 is an audio special purpose device whose amplification, voltage heading and level shifting functions are used to enhance the signal from multiple audio sources. Utilizing a Millmax™ audio terminal package, a low voltage, low power amplifier is integrated into a single device. This device is a 2-channel, low-noise amplifier that has the ability to operate from a single supply up to 10V, or a dual supply up to 5.5V. It features a low frequency distortion, high channel separation and high stability, and is designed for use in modern audio applications such as speakers, headphones and portable media players.

Application Field

The PGA2311UAG4 is designed for use in the audio field, with applications in both consumer and professional products. This device can be used as a low voltage mono amplifier, bridging the gap between an amplifier module and audio signal. In professional products it can be used to drive headphones, active loudspeakers, and remote speakers. In consumer products it can be used for personal audio devices or computer audio cards that require a low voltage, low power amplifier.

Working Principle

The working principle of the PGA2311UAG4 involves two stages of amplification. The first stage is the voltage headstage, which amplifies the incoming signal - typically from a microphone or line level source - before it is sent to the second stage of amplification, a differential amplifier circuit. This second stage amplifies the signal resulting in a stable and clean output signal. Additionally, the output from this stage is level shifted up to five times the input voltage, allowing the device to work with a range of operating temperatures and supply voltages.

The device also features a number of protective features which ensure the quality of the sound output. These include thermal protection, under voltage and over voltage protection, as well as DC output offset protection and ESD protection. All of these features are designed to protect the unit and increase the longevity of its use.

Conclusion

The PGA2311UAG4 is an advanced audio special purpose device specifically designed for operation in a variety of audio systems. It offers a low voltage operation up to 10V, a low noise amplifier, high channel separation and high stability. Its two-stage amplification, voltage headstage and level shifting offer an excellent output signal quality, which makes it suitable for a range of audio applications including professional products and consumer devices. Additionally, it features a range of protective features which help to prolong its life.

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