A 1.5 V, 4.1 mW dual channel audio delta-sigma D/A converter

This stereo /spl Delta//spl Sigma/ DAC for portable digital-audio consumes 4.1 mW at 1.5 V supply. The DAC has 90 dB dynamic range over a 20 Hz-20 kHz passband. The 5.3 mm/sup 2/ chip in 0.6 /spl mu/m CMOS includes low-threshold devices.