A 23mW, 73dB dynamic range, 80MHz BW continuous-time delta-sigma modulator in 20nm CMOS

Abstract

A 23mW, 80MHz BW, 73dB dynamic range continuous-time ΔΣ modulator in 20nm CMOS is presented. The modulator operates from 1.0/1.2/1.5V supplies. Power is minimized by combining a low OSR, fast digital excess loop delay compensation scheme, and several techniques to minimize delay in the feedback path. The result is a highly power efficient modulator that achieves an FOM(DR) of 168dB.