A 16-bit sigma-delta ADC applied in micro-machined inertial sensor

This paper presents a low-distortion sigma-delta (Sigma-Delta) ADC for micro-machined inertial sensors. The design adopts a single-loop, fourth-order low-pass single-bit modulator with feedforward paths which can ensure the signal transfer lossless and reduce the nonlinearity and power consumption. The chip is manufactured in standard 0.5 mu m CMOS process, and the area is 2.2mm(2). The ADC achieves 108dB signal to noise ratio (SNR) and 110dB dynamic range (DR). Total power consumption is less than 15mW with 5V supply. (C) 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.