AD1953

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SigmaDSP^® Digital Audio Processor

Data Sheet (Rev. A) Product Selection Table

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Overview

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

7 Biquad Filter Sections per Channel
Curve and Adjustable Time Constants
0 ms to 6 ms Variable Delay/Channel for Speaker Alignment
See data sheet for additional features

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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