Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications
This study presents a survey of the most promising reported SAR ADC designs for biomedical applications, stressing advantages, disadvantages, and limitations, and concludes with a quantitative comparison. Recent progress in the development of a single SAR ADC architecture is reviewed. In wearable an...
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| Format: | Article |
| Language: | English |
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Wiley
2023-01-01
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| Series: | Active and Passive Electronic Components |
| Online Access: | http://dx.doi.org/10.1155/2023/3669255 |
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| author | Kawther I. Arafa Dina M. Ellaithy Abdelhalim Zekry Mohamed Abouelatta Heba Shawkey |
| author_facet | Kawther I. Arafa Dina M. Ellaithy Abdelhalim Zekry Mohamed Abouelatta Heba Shawkey |
| author_sort | Kawther I. Arafa |
| collection | DOAJ |
| description | This study presents a survey of the most promising reported SAR ADC designs for biomedical applications, stressing advantages, disadvantages, and limitations, and concludes with a quantitative comparison. Recent progress in the development of a single SAR ADC architecture is reviewed. In wearable and biosensor systems, a very small amount of total power must be devoured by portable batteries or energy-harvesting circuits in order to function correctly. During the past decade, implementation of the high energy efficiency of SAR ADC has become the most necessary. So, several different implementation schemes for the main components of the SAR ADC have been proposed. In this review study, the various circuit architectures have been explained, beginning with the sample and hold (S/H) switching circuits, the dynamic comparator, the internal digital-to-analog converter (DAC), and the SAR control logic. In order to achieve low power consumption, numerous different configurations of dynamic comparator circuits are revealed. At the end of this overview, the evolutions of DAC architecture in distinct biomedical applications today can make a tradeoff between resolution, speed, and linearity, which represent the challenges of a single SAR ADC. For high resolution, the dual split capacitive DAC (CDAC) array technique and hybrid capacitor technique can be used. Also, for ultralow power consumption, various voltage switching schemes are achieved to reduce the number of switches. These schemes can save switching energy and reduce capacitor array area with high linearity. Additionally, to increase the speed of the conversion process, a prediction-based ADC design is employed. Therefore, SAR ADC is considered the ideal solution for biomedical applications. |
| format | Article |
| id | doaj-art-e4ba2fad47d34951a2088ba41fec1c55 |
| institution | Kabale University |
| issn | 1563-5031 |
| language | English |
| publishDate | 2023-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Active and Passive Electronic Components |
| spelling | doaj-art-e4ba2fad47d34951a2088ba41fec1c552025-08-20T03:25:11ZengWileyActive and Passive Electronic Components1563-50312023-01-01202310.1155/2023/3669255Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical ApplicationsKawther I. Arafa0Dina M. Ellaithy1Abdelhalim Zekry2Mohamed Abouelatta3Heba Shawkey4Electronics and Communications DepartmentMicroelectronics DepartmentElectronics and Communications DepartmentElectronics and Communications DepartmentMicroelectronics DepartmentThis study presents a survey of the most promising reported SAR ADC designs for biomedical applications, stressing advantages, disadvantages, and limitations, and concludes with a quantitative comparison. Recent progress in the development of a single SAR ADC architecture is reviewed. In wearable and biosensor systems, a very small amount of total power must be devoured by portable batteries or energy-harvesting circuits in order to function correctly. During the past decade, implementation of the high energy efficiency of SAR ADC has become the most necessary. So, several different implementation schemes for the main components of the SAR ADC have been proposed. In this review study, the various circuit architectures have been explained, beginning with the sample and hold (S/H) switching circuits, the dynamic comparator, the internal digital-to-analog converter (DAC), and the SAR control logic. In order to achieve low power consumption, numerous different configurations of dynamic comparator circuits are revealed. At the end of this overview, the evolutions of DAC architecture in distinct biomedical applications today can make a tradeoff between resolution, speed, and linearity, which represent the challenges of a single SAR ADC. For high resolution, the dual split capacitive DAC (CDAC) array technique and hybrid capacitor technique can be used. Also, for ultralow power consumption, various voltage switching schemes are achieved to reduce the number of switches. These schemes can save switching energy and reduce capacitor array area with high linearity. Additionally, to increase the speed of the conversion process, a prediction-based ADC design is employed. Therefore, SAR ADC is considered the ideal solution for biomedical applications.http://dx.doi.org/10.1155/2023/3669255 |
| spellingShingle | Kawther I. Arafa Dina M. Ellaithy Abdelhalim Zekry Mohamed Abouelatta Heba Shawkey Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications Active and Passive Electronic Components |
| title | Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications |
| title_full | Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications |
| title_fullStr | Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications |
| title_full_unstemmed | Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications |
| title_short | Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications |
| title_sort | successive approximation register analog to digital converter sar adc for biomedical applications |
| url | http://dx.doi.org/10.1155/2023/3669255 |
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