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A multibit delta-sigma audio DAC with 120-dB dynamic range
Fujimori, I.; Nogi, A.; Sugimoto, T.;
Solid-State Circuits, IEEE Journal of
Volume 35,
Issue 8,
Aug. 2000
Page(s):1066
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1073
Abstract:
A 24-bit 192-kHz sample-rate digital-to-analog converter (DAC) achieves 120-dB A-weighted dynamic range in the 20-kHz band, and consumes 310 mW with a 5-V power supply. A third-order five-bit ΔΣ architecture optimized for high-end consumer audio has been developed and used. A switched-capacitor (SC) DAC combined with infinite-impulse response (IIR) and finite-impulse response (FIR) filters is employed to increase immunity to clock jitter, and reduce analog power. Partial-range dynamic element matching (DEM) enhances mismatch shaping with reduced circuit overhead. The 7.8-mm2 chip fabricated in 0.5-μ m CMOS integrates a stereo DAC and all functions required for DVD-audio playback
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