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High-linearity flash ADC achieved through design-technology co-optimization based on two-dimensional semiconductor.

Xiangqi Dong¹, Yuxuan Zhu¹, Xiangyu Liu¹

¹College of Integrated Circuits and Micro-Nano Electronics, Zhangjiang Fudan International Innovation Center, Fudan University, Shanghai 200433, China.

Science Bulletin

|October 8, 2025

Summary

This summary is machine-generated.

This study introduces a novel 3-bit Flash analog-to-digital converter (ADC) using two-dimensional semiconductors (2DSCs). The innovative design significantly reduces nonlinearity and achieves ultra-low power consumption for Internet of Things (IoT) applications.

Keywords:

Analog-to-digital converter (ADC)Design-technology co-optimization Edge contact MoS(2)

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Area of Science:

Materials Science
Electrical Engineering
Semiconductor Physics

Background:

The Internet of Things (IoT) drives demand for low-power, stable analog-to-digital converters (ADCs).
Conventional silicon ADCs face limitations in miniaturization, wearability, and power efficiency for IoT devices.
Two-dimensional semiconductors (2DSCs) offer potential for low-power and flexible electronics but present integration challenges.

Purpose of the Study:

To present an innovative 3-bit Flash ADC circuit design utilizing 2DSCs.
To address the challenges of integrating 2DSCs into complex mixed-signal circuits for high-performance ADCs.
To achieve reduced nonlinearity and ultra-low power consumption in a single-chip ADC.

Main Methods:

Synergistic optimization of materials, fabrication processes, and circuit design for 2DSC-based ADCs.
Development of a novel 3-bit Flash ADC architecture tailored for 2DSC integration.
Characterization of nonlinearity (DNL, INL) and power consumption.

Main Results:

Achieved a differential nonlinearity (DNL) of 0.072 least significant bit (LSB).
Recorded an integral nonlinearity (INL) of 0.128 LSB.
Demonstrated remarkably low power consumption of 3.36 μW.

Conclusions:

The proposed 2DSC-based 3-bit Flash ADC offers a promising solution for low-power, high-performance analog-to-digital conversion in IoT.
The integrated approach to materials, fabrication, and circuit design effectively minimizes nonlinearity.
This work paves the way for advanced flexible and wearable electronic systems.