An N-Type-Only a-IGZO Thin-Film-Transistor Based Nyquist-Rate 8-bit CDAC+SAR ADC Consuming 1.7mW at 32ksps and Achieving 44dB SNDR
Year: 2025
Type: conference-paper
Abstract: This paper presents an 8-bit SAR-ADC design implemented using n-type-only a-IGZO devices in a TFT-on-foil technology. The ADC operates at a sampling rate of 32ksps, consuming 1.7mW, and achieves an SNDR of 44dB, resulting in a$\text{FOM}_{\mathrm{W}}$of 410 pJ/c.s. This performance surpasses the current state-of-the-art thin-film designs by approximately 50x, closing the gap between thin-film and Silicon design space, making all TFT flexible bioelectronic sensors feasible. The high sampling rate and accuracy allow for the digitization of signals directly on a flexible biomedical sensor, providing a digital output resistant to noise and interference.
Authors: Mohit Dandekar, Kris Myny
Institution: KU Leuven
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
Funder: Emory University
Award: G703365764
OpenAlex ID: W4412963973