SA571DR2

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Audio Special Purpose: SA571DR2 application field and working principle

The SA571DR2 is a Siliconixt audio preamplifier produced by Infineon Technologies and is part of their Audio Special Purpose range. This product includes an integrated preamplifier and an output driver amplifier that are suitable for use in consumer digital audio applications, as well as in professional audio applications.

FEATURES

• Integrated microphone preamplifier (20 dB gain)
• Low noise and distortion (* THD+N 0.05%)
• Low power consumption (1mA typ load current)
• Convenient dual-in-line package

APPLICATIONS

The SA571DR2 is designed for use in a variety of audio applications, including consumer audio amplifiers, audio mixers, professional audio systems, and other audio applications.

WORKING PRINCIPLE

The SA571DR2 audio preamplifier consists of two separate components: the preamplifier stage and the output driver amplifier stage. The preamplifier stage is a single-ended, low-noise preamplifier which amplifies the input signal (such as the signal from a microphone or other audio source) to a level suitable for driving the output driver amplifier stage. The output driver amplifier is a single-ended class-AB amplifier which is capable of providing up to 600mW of output power into a 4Ω loudspeaker.

The combination of the two stages provides a signal chain with a low noise floor and a wide bandwidth, suitable for a variety of audio applications. The SA571DR2 also includes an adjustable gain control, allowing the user to select a desired level of amplification for the input signal.

SUMMARY

The SA571DR2 is an integrated preamplifier and output driver amplifier suitable for use in a variety of audio applications. The preamplifier stage provides low noise and distortion, while the output driver amplifier is capable of driving up to 600mW into a 4Ω loudspeaker. The SA571DR2 also includes a variable gain control, allowing the user to adjust the level of amplification for the desired application.

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