A 90μW 15-bit ΔΣ ADC for digital audio

A 90μW 15-bit ΔΣ ADC for digital audio

Architecture, circuit design details and measurement results for a 15 bit audio continuous-time DeltaSigma modulator (CTDSM) are given. The converter, designed in a 0.18 mum CMOS technology, achieves a dynamic range of 93.5 dB in a 24 kHz bandwidth and dissipates 90 muW from a 1.8 V supply. It featu...

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Bibliographische Detailangaben
Hauptverfasser: Pavan, S., Krishnapura, N., Pandarinathan, R., Sankar, P.
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Bandwidth
CMOS technology
Filters
Jitter
Multi-stage noise shaping
Noise reduction
Operational amplifiers
Quantization
Resistors
Transfer functions
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Beschreibung
Zusammenfassung:Architecture, circuit design details and measurement results for a 15 bit audio continuous-time DeltaSigma modulator (CTDSM) are given. The converter, designed in a 0.18 mum CMOS technology, achieves a dynamic range of 93.5 dB in a 24 kHz bandwidth and dissipates 90 muW from a 1.8 V supply. It features a third order active-RC loop filter, a very low power 4-bit flash quantizer and an efficient excess delay compensation scheme to reduce power dissipation.
ISSN:1930-8833
2643-1319
DOI:10.1109/ESSCIRC.2007.4430279