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A 0.027-mm2 Self-Calibrating Successive Approximation ADC Core in 0.18-µm CMOS

Yasuhide KURAMOCHI, Akira MATSUZAWA, Masayuki KAWABATA

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Summary :

We present a 10-bit 1-MS/s successive approximation analog-to-digital converter core including a charge redistribution digital-to-analog converter and a comparator. A new linearity calibration technique enables use of a nearly minimum capacitor limited by kT/C noise. The ADC core without digital control blocks has been fabricated in a 0.18-µm CMOS process and consumes 118 µW at 1.8 V power supply. Also, the active area of ADC core is realized to be 0.027 mm2. The calibration improves the SNDR by 13.4 dB and the SFDR by 21.0 dB. The measured SNDR and SFDR at 1 kHz input are 55.2 dB and 73.2 dB respectively.

Publication
IEICE TRANSACTIONS on Fundamentals Vol.E92-A No.2 pp.360-366
Publication Date
2009/02/01
Publicized
Online ISSN
1745-1337
DOI
10.1587/transfun.E92.A.360
Type of Manuscript
Special Section PAPER (Special Section on Analog Circuit Techniques and Related Topics)
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