SigmaDSP Digital Audio Processor

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.

APPLICATIONS

* 2.0/2.1 Channel Audio Systems (2 Main Channels Plus Subwoofer)

* Multichannel Automotive Sound Systems

* Multimedia Audio

* Mini Component Stereo

* Home Theater Systems (AC-3 Postprocessor)

* Musical Instruments

* In-Seat Sound Systems (Aircraft, Motor Coaches)

* 5 V 3-Channel Audio DAC System

* Digital Audio Output (2-Channel or 6-Channel Packed Mode)

* Accepts Sample Rates up to 48 kHz

* Dual Dynamic Processor with Arbitrary Input/Output