Background ADC Calibration in Digital Domain
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A 100MS/s pipelined ADC is digitally calibrated by a slow ADC using a least-mean-square (LMS) algorithm. Both linear and nonlinear memoryless residue gain errors of the pipeline stages are adaptively corrected. With a 411kHz sinusoidal input, the peak SNDR Improves from 28dB to 59dB and the SFDR Improves from 29dB to 68dB. The complete 0.13m ADC SoC occupies a die size of 3.7mm 4.7mm, and consumes a total power of 448mW. 2008 IEEE.