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http://dx.doi.org/10.5573/JSTS.2017.17.3.438

A Low-power High-resolution Band-pass Sigma-delta ADC for Accelerometer Applications  

Cao, Tianlin (Institute of Microelectronics, Zhejiang University)
Han, Yan (Institute of Microelectronics, Zhejiang University)
Zhang, Shifeng (Institute of Microelectronics, Zhejiang University)
Cheung, Ray C.C. (Department of Electronic Engineering, Chinese University of Hong Kong)
Chen, Yaya (Institute of Microelectronics, Zhejiang University)
Publication Information
JSTS:Journal of Semiconductor Technology and Science / v.17, no.3, 2017 , pp. 438-445 More about this Journal
Abstract
This paper presents a low-power high-resolution band-pass ${\Sigma}{\Delta}$ ADC for accelerometer applications. The proposed band-pass ${\Sigma}{\Delta}$ ADC consists of a high-performance 6-th order feed-forward ${\Sigma}{\Delta}$ modulator with 1-bit quantization and a low-power, area-efficient digital filter. The ADC is fabricated in 180 nm 1P6M mixed-signal CMOS process with a die area of $5mm^2$. This high-resolution ADC got 90 dB peak signal to noise plus distortion ratio (SNDR) and 96 dB dynamic range (DR) over 4 kHz bandwidth, while the intermediate frequency (IF) is shifting from 100 KHz to 200 KHz. The power dissipation of the chip is 5.6 mW under 1.8 V (digital)/3.3 V (analog) power supply.
Keywords
Band pass; ${\Sigma}{\Delta}$ ADC; low-power; high-resolution; accelerometer;
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