A 1 V 88 dB 20 kHz /spl Sigma//spl Delta/ modulator in 90 nm CMOS

A third-order single-loop SC /spl Sigma//spl Delta/ modulator is realized in a standard 90 nm digital CMOS technology. The modulator achieves 88 dB dynamic range for a 20 kHz signal bandwidth with an OSR of 100. Power consumption is 140 /spl mu/W from a 1 V supply, and the chip core size is 0.18 mm/sup 2/.