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A complementary dynamic single-stage residue amplifier for a pipelined SAR ADC is presented. It re-uses charge typically wasted during the reset phase, and hence improves efficiency by a factor 2× in this block that often dominates the fundamental noise/power trade-off of the ADC. The residue amplifier achieves 90 µVrms input noise for an energy consumption of 1.5 pJ. It is used in a 2-times interleaved...
We present a 200 MS/s 2x interleaved 14 bit pipelined SAR ADC in 28nm digital CMOS. The ADC uses a new residue amplifier for low noise at low power, and incorporates interleaved channel time-constant calibration. The ADC achieves a peak SNDR of 70.7 dB at 200 MS/s while consuming 2.3 mW from an 0.9 V supply.
A 410 MS/s 2x interleaved 11bit pipelined SAR ADC in 28nm digital CMOS is presented. Each ADC channel consists of a 6b coarse SAR, a dynamic residue amplifier and a 7b fine SAR and includes an on-chip calibration engine that detects and corrects comparator offsets and amplifier gain errors in the background. The ADC achieves a peak SNDR of 59.8 dB at 410 MS/s for an energy per conversion step of 6...
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