A 10.4mW 50MHz-BW 80dB-DR Single-Opamp Third-Order CTSDM with SAB-ELD-Merged Integrator and 3-Stage Opamp

Abstract

This paper presents a wideband and energy-efficient single-loop 3rd order CTSDM enabled by an ELD-SAB-Merged integrator and a 3-stage opamp. We utilize only a single DAC and opamp to accomplish the ELD compensation in the SAB structure. While featuring a PSQ technique and a 1st order NS-SAR, the 28nm prototype achieves a 74.4dB SNDR in a 50MHz BW and consumes 10.4mW with 171.2dB FoMS.