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The ALC650 integrates a 50mW/20ohm headset audio amplifier into the CODEC, which can save BOM costs. The digital interface circuitry of the ALC650 CODEC operates from a 3.3V power supply with EAPD (External Amplifier Power Down) control for use in notebook and PC applications. The ALC650 CODEC provides three pairs of stereo outputs with independent volume controls, a mono output, and multiple stereo and mono inputs, along with flexible mixing, gain and mute functions to provide a complete integrated audio solution for PCs. The ALC650 AC'97 CODEC supports multiple CODEC extensions with independent variable sampling rates and built-in 3D effects.
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The ALC650 incorporates proprietary converter technology to achieve a high SNR, greater than 90 dB. The ALC650 is an 18-bit, full duplex AC'97 2.2 compatible stereo audio CODEC designed for PC multimedia systems, including host/soft audio and AMR/CNR based designs.