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, internal supply bootstrapping nor resistors. A complete design methodology from architecture to CMOS 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, a 50-kHz ΔΣM IP mapping example in 1.8-V 180-nm CMOS technology is presented with experimental SNDRmax>85 dB and FOMS> 160 dB while dissipating 1.4 mW.
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