描述：ADAU1401A SigmaDSP 28-/56-Bit Audio Processor with Two ADCs and Four DACs The AD1953 is a complete, 26-bit, single-chip, 3-channel digital audio playback system with built-in DSP functionality. Key features include: 3 channels of digital audio, 6-channel TDM output mode, a 7-band, 48-bit stereo equalizer, delays for loudspeaker location adjustment, Phat Stereo? spatial enhancement, and a dual-band, professional-quality dynamics processor. Its three DACs achieve 112 dB signal-to-noise ratio (SNR) at 48 kHz. Its dynamic processing features include: Finely-tuned bass boost to enhance low frequencies for small loudspeakers Algorithms that virtually increase loudness by removing distortion at high volumes Midnight mode which automatically reduces loudness in high-volume instances (e.g., sudden loud scenes on DVDs) Low-level expansion to lift low-volume signals above road noise (for car stereos) Pricing and Availability: The AD1953 SigmaDSP Digital Audio Processor is available in a 48-pin TQFP package and is rated for the extended -40°C to +105°C temperature range. The AD1953 is sampling now; production begins Fall 2002. Prices begin at $5.88 in 10,000-piece quantities.
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