Novel Calibration Method for a 16-bit 1.5 Megasamples/s Successive Approximation ADC with Non-binary Capacitor Array |
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| Jianhua Gan, Shouli Yan, Jacob Abraham |
- Abstract:
- A novel calibration method for successive approximation analog-to-digital converter with non-binary capacitor array is presented. It takes advantage of the redundancy in the radix less than 2 non-binary capacitor array and the adaptive calibration algorithm. The capacitor weights are adaptively calibrated to accurately reflect the actual capacitance ratios in the fabricated capacitor array even without good capacitor matching. The capacitor weights are calibrated to better than 22-bit accuracy. The matching requirement in the capacitor array is greatly relaxed. The method is used to design a 16-bit, 1.5 megasamples/s successive approximation analog-to-digital converter.
- Keywords:
- Analog-to-Digital Converter, ADC Calibration, Successive Approximation, Non-binary Capacitor Array
- Download:
- IMEKO-IWADC-2003-06.pdf
- DOI:
- -