A 98.5dB-SNDR 250kHz-BW 1V-Supply Continuous-Time Zoom ADC with Smart-Tracking and Floating-Tail-Resistor Linearized Gm-C Loop Filter

Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference 2026

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Authors: Chaoyang Xing, Yilu Cui, Sining Pan, Yi Zhong, Nan Sun, Lu Jie
DOI: 10.1109/isscc49663.2026.11409150
Cited by: 0
References: 7

Abstract

This paper presents a 98.5 dB SNDR, 250 kHz bandwidth CT incremental Zoom ADC. The design features a chopped capacitive front-end, Gm-C residue integrator, and 10b SAR ADC. A smart-tracking (ST) technique with dynamic step-sizing extends the input tracking bandwidth to the Nyquist frequency. A floating-tail-resistor (FTR) linearized Gm-C integrator achieves high linearity and efficiency. Fabricated in 28nm CMOS, the ADC consumes$400 \mu \mathrm{W}$and achieves a superior 186.5 dB FoMs.

Fields of Study & Subjects

Analog and Mixed-Signal Circuit Design Radio Frequency Integrated Circuit Design Advancements in PLL and VCO Technologies

Publication details

Journal / source
Digest of technical papers/Digest of technical papers - IEEE International Solid-State Circuits Conference
Pages
1–3
Publication date
15 February 2026
Language
EN