Open AccessA low‐cost digital calibration scheme for high‐resolution SAR ADC using Adaptive‐LMS
Author(s) -
Yang Yongkui,
Yin Tingting,
Liu Jiping,
Yao Enyi
Publication year - 2022
Publication title -
electronics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.375
H-Index - 146
eISSN - 1350-911X
pISSN - 0013-5194
DOI - 10.1049/ell2.12659
Subject(s) - successive approximation adc , calibration , offset (computer science) , capacitor , electronic engineering , computer science , least mean squares filter , scheme (mathematics) , adaptive filter , engineering , mathematics , voltage , electrical engineering , mathematical analysis , statistics , programming language
This paper presents a novel low‐cost digital calibration scheme using Adaptive‐LMS for high‐resolution SAR ADCs. This proposed Adaptive‐LMS is realized by perturbing adaptive analog offset and skipping several LSBs' calibration. Compared with a digital calibration scheme based on conventional LMS, the design saves not only die cost but also testing cost (less testing time). During the testing process, the proposed method requires only 16,000 samples to calibrate the capacitor mismatch and the SNDR is improved from 54.1 dB to 68.1 dB for a 12‐bit SAR ADC.