A 16bit 50kHz 177dB-FOMS Calibration-Free Bootstrapping-Free SC Delta-Sigma Modulator IP Block for Low-Power High-Resolution ADCs

Abstract

This paper presents a switched-capacitor Delta-Sigma modulator (ΔΣM) IP block for low-power high-resolution ADCs. The ΔΣM IP proposal does not require any circuit calibration neither internal supply bootstrapping. A complete design methodology from architecture to circuit levels with specific optimization of the overall power consumption is included. The presented ΔΣM IP block features a remarkable robustness against both process and temperature variations. For illustrative purposes, two 16-bit 50-kHz IP mapping examples in 1.8-V 180-nm and 1.2-V 65-nm mixed-signal CMOS technologies are presented with post-layout simulation results showing FOMS values around 177 dB.