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

In the stereo audio DAC here presented, the tradeoff between area-power consumption-SNPout-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-mu m CMOS technology, the stereo DAC achieves a 97-dB dynamic range and a 39-dB SNRout with a 0.22-mm(2) area and 7.25-mW power consumption per channel.