• Floating charge-transfer amplifier topology improves PSRR and common-mode rejection, achieving ±2.7% gain variation over PVT without trimming.
• Hybrid mismatch shaping (DWA+MES) and system-level chopping enable a 120 dB SNDR, 189 dB FoMs NS-SAR ADC.
• Cross-stage gain-mismatch-error-shaping technique achieves calibration-free NS pipelined-SAR ADC with 93.3 dB SNDR and 180.4 dB FoMs.
• Pre-comparison during sampling solves MES saturation, enhancing robustness of high-precision ADCs.