Novel hybrid D/A structures for high-resolution SAR ADCs—analysis, modeling and realization

Tong, Xingyuan; Yang, Yong; Zhu, Zhangming; Liu, Lianxi

doi:10.1016/j.mejo.2011.04.016

Cited by 5 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proposed hybrid capacitor array and resistor string architecture that is implemented in a segmented manner enables the DAC resolution to be enhanced via the combination of different types of sub-DACs together. The data taken from the previous study by Xingyuan et al, [4] have shown that these methods are widely implemented in high-resolution SAR ADCs of 12 bits or greater. These types of circuits are also highly sought after in line with the advancement of wireless sensor networks and very-large-scale integration (VLSI) applications, which correlates with the reviews performed by Chen et al, [5], Gaddam et al, [6] and Fan [7].…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, the work performed by Ma et al, [8] has revealed that the implementation of this hybrid architecture has the unique advantage of allowing designers to introduce different types of methods to optimize each sub-DAC based on their individual design requirements and other uncorrelated process parameters, thereby enabling the overall performance of the full DAC circuit to be adequately enhanced. Furthermore, the work carried out by Kim et al, [9] explained that the separation of the resolution bits across two distinct components is mutually beneficial to both sub-DACs as it helps to relax the matching requirement of the 10-bit RDAC (only used for the 10 LSBs) by a factor of 2 4 , whereas it reduces the total unit capacitors required for the 4-bit CDAC (only used for the 4 MSBs) by a factor of 2 10 . This would enable the overall die area to be substantially reduced as the number of DAC components tend to increase exponentially with resolution without the presence of segmented circuit arrays.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Hybrid CMOS Digital-to-Analogue Converters Design for High Resolution SAR ADC

Matthew Khoo Kah Wen,

Nabihah Ahmad,

Yuzman Yusoff

et al. 2023

ARASET

View full text Add to dashboard Cite

The paper describes the design and implementation of a 14-bit differential Digital-to-Analogue Converter (DAC) based on the Silterra 0.18µm Complementary Metal-Oxide-Semiconductor (CMOS) process to be established in a Successive Approximation Register (SAR) Analogue-to-Digital Converter (ADC) for the purpose of high-resolution, high accuracy and low power applications. The proposed differential DAC aims to eliminate the issue of stringent matching requirements imposed on high-resolution DACs while leveraging both linearity performance and power consumption parameters at a balanced point. The overall differential circuit consists of two parallel single-ended DACs that utilize a 4-bit Capacitor DAC (CDAC) and 10-bit Resistor DAC (RDAC) on each end, thereby establishing a hybrid-based architecture. Furthermore, the authors illustrate the proposed switching procedures applied to the sub-DAC circuits to ensure a low-power design is established. The new method effectiveness evaluation is confirmed by detailed transient simulations implemented on the DAC where the circuit performs the required conversions at a maximum conversion frequency of 2.5 MS/s with a peak power consumption of 0.1496mW for the standard voltage supply of 2.1V. Meanwhile, the schematic and post-layout simulations performed on the DAC registers peak DNL errors of -0.1612 and -0.8272, respectively. New research results depict performance improvements in terms of resolution and power consumption which facilitates the DAC implementation in contemporary electronic devices such as microcontroller peripherals and audio amplification devices. The overall deigned circuit is capable of achieving the desired 14-bit digital-to-analogue conversions under the CMOS 0.18µm technology, proving the DAC’s high-resolution efficacy.

show abstract