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A 0.22-mm2 7.25-mW per-channel audio stereo-DAC with 97-dB DR and 39-dB SNRout

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6 Author(s)
V. Colonna ; STMicroelectronics, Cornaredo, Italy ; M. Annovazzi ; G. Boarin ; G. Gandolfi
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In the stereo audio DAC here presented, the tradeoff between area-power consumption-SNRout-dynamic range is optimized for the case of a 96-dB audio system. Using a single-opamp switched-capacitor structure for the reconstruction filter, a hybrid FIR/IIR transfer function allows to reject out-of-band noise. This circuit solution strongly reduces area and power consumption. In a 0.13-μm CMOS technology, the stereo DAC achieves a 97-dB dynamic range and a 39-dB SNRout with a 0.22-mm2 area and 7.25-mW power consumption per channel.

Published in:

IEEE Journal of Solid-State Circuits  (Volume:40 ,  Issue: 7 )