A 10-bit 50-MS/s SAR ADC for dual-voltage domain portable systems

Wei Hao Tsai, Che Hsun Kuo, Soon Jyh Chang, Li Tse Lo, Ying Cheng Wu, Chun Jen Chen

研究成果: Conference contribution

4 引文 斯高帕斯(Scopus)

摘要

The analog-to-digital converter (ADC) is an essential component providing the interface between the sensed analog signal and the corresponding digital representation for a portable ultrasonic systems. In order to extend the battery life for the portable system, a low-voltage ADC is crucial for saving the power. However, the sensed analog signal is usually larger than the tolerable range of a low-voltage ADC. A level shifter, which possibly consumes more power than ADC, is therefore adopted to solve this problem. This paper presents a 10-bit 50-MS/s successive approximation register (SAR) ADC by manipulating simple but effective circuit design techniques to operate at dualvoltage domain without the need of an additional level shifter for shrinking the input signals. Particularly, we propose a technique to implement the ADC with 3.3-V I/O devices and 1.2V MOS transistors. The proof-of-concept design was fabricated in TSMC 130-nm 1P8M CMOS technology. It consumes 1.6 mW at a 50 MS/s sampling frequency and about 2 MHz sinusoidal input signal with 1.65V input common-mode voltage and 2Vp-p differential input amplitude. The measurement result shows an ENOB of 9.15 bits, and both the DNL and INL are within 1 LSB. The active area is 0.226 mm2.

原文English
主出版物標題2015 IEEE International Symposium on Circuits and Systems, ISCAS 2015
發行者Institute of Electrical and Electronics Engineers Inc.
頁面2425-2428
頁數4
ISBN(電子)9781479983919
DOIs
出版狀態Published - 2015 七月 27
事件IEEE International Symposium on Circuits and Systems, ISCAS 2015 - Lisbon, Portugal
持續時間: 2015 五月 242015 五月 27

出版系列

名字Proceedings - IEEE International Symposium on Circuits and Systems
2015-July
ISSN(列印)0271-4310

Other

OtherIEEE International Symposium on Circuits and Systems, ISCAS 2015
國家/地區Portugal
城市Lisbon
期間15-05-2415-05-27

All Science Journal Classification (ASJC) codes

  • 電氣與電子工程

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