A Design of 10-Bit Asynchronous SAR ADC with an On-Chip Bandgap Reference Voltage Generator

Verma, Deeksha; Shehzad, Khuram; Kim, Sung Jin; Pu, Young Gun; Yoo, Sang-Sun; Hwang, Keum Cheol; Yang, Youngoo; Lee, Kang-Yoon

doi:10.3390/s22145393

Cited by 4 publications

(3 citation statements)

References 25 publications

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“…Some circuit modules, such as a low-voltage differential linear regulator, digital-to-analog converter, and transformer, will directly affect the performance of the overall circuit. Common reference source voltage varies with temperature obviously, and it is easy to be interfered with by power supply noise, thus affecting the stability of the whole circuit [2] .…”

Section: Introductionmentioning

confidence: 99%

Design of a High PSRR Low-pressure Bandgap Reference Source with Curvature Compensation

Liu,

Wang

2023

J. Phys.: Conf. Ser.

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Based on the NUVOTON 0.35 μm BCD process, a low voltage bandgap reference with an input voltage of 5 V and output voltage of 0.6 V is designed in this paper. The traditional low-voltage bandgap reference output voltage has a large temperature coefficient and poor ability to suppress power supply fluctuations. In this paper, a circuit with high order compensation is proposed to reduce the temperature coefficient of the circuit, and a pre-regulated circuit is used to increase the power supply rejection ratio. The simulation results are at -30 °C∼130 °C. The output voltage of reference voltage is 947.5 μV, the temperature coefficient is 9.58 ppm/°C, and the power suppression ratio is -104.62 dB, which meets the design requirements of the power management chip.

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Section: Introductionmentioning

confidence: 99%

Design of a High PSRR Low-pressure Bandgap Reference Source with Curvature Compensation

Liu,

Wang

2023

J. Phys.: Conf. Ser.

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“…In comparison with other ADC architectures, the SAR ADC is recommended for its simplicity and lower energy consumption [9 -11]. In recent trends, the SAR ADC can generate a sampling speed of up to several tens of MS/s for medium resolution, resulting in the design of high-speed and lower power ADCs [12]. These features make the SAR ADC the ideal choice for several applications such as battery management systems, energy harvesting system, data acquisition systems etc.…”

Section: Introductionmentioning

confidence: 99%

CMOS Analog-to-Digital Converter for Perovskite PV Sensing Applications

Mokogwu,

Marzuki,

et al. 2023

Preprint

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<p> An 8-bit asynchronous single-ended Successive Approximation Register (SAR) Analog-to-Digital Converter (ADC) for the realization of a perovskite photovoltaic (PV) sensing application is presented. Various techniques have been proposed to enhance speed and power efficiency. A bootstrap transmission gate-based sample and hold circuit is proposed to improve sampling linearity and reduce power consumption. The sample and hold circuit is configured to operate at a 90% duty cycle, hence, giving it enough time for the conversion. A two-stage latch dynamic comparator is implemented to ensure high-speed and low power consumption. The SAR ADC also implements an asynchronous SAR logic block, controlled by an internal clock, which eliminates the need for an external clock. The proposed SAR ADC was designed in a UMC 180nm CMOS technology. The SAR ADC is tested with a sinusoidal analog input of 500 mV at 10 kHz frequency and a 4 MHz input clock frequency. The SAR ADC consumes a power of 2.67 mW at a supply of 1.5 V. The proposed ADC is an important unit for application in the fast growing perovskite-based PV industry. </p>

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“…Therefore, a quality voltage reference with high-order temperature compensation will be needed by many high-performance electronic systems, such as the example as depicted in Figure 1 . In general, the voltage reference design can be classified into bandgap reference (BGR) circuits [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 ] and subthreshold-based MOSFET voltage reference circuits [ 13 , 14 , 15 , 16 ]. They are utilized in applications that include analog-to-digital converters (ADC) [ 11 ], digital-to-analog converters (DAC) [ 12 ], sensor applications [ 13 , 14 , 15 , 16 ], and so forth.…”

Section: Introductionmentioning

confidence: 99%

Design of Precision-Aware Subthreshold-Based MOSFET Voltage Reference

Chan

2022

Sensors

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A new precision-aware subthreshold-based MOSFET voltage reference is presented in this paper. The circuit was implemented TSMC−40 nm process technology. It consumed 9.6 at the supply voltage of 1.2 V. In this proposed work, by utilizing subthreshold-based MOSFET instead of bipolar junction transistor (BJT), relatively lower power consumption was obtained in the design while offering comparable precision to that offered by its BJT counterpart. Through the proposed second-order compensation, it achieved the temperature coefficient (T.C.) of 3.0 ppm/ in the TT corner case and a 200-sample Monte-Carlo T.C. of 12.51 ppm/ from −40 to 90 . This shows robust temperature insensitivity. The process sensitivity of without and with trimming was 2.85% and 0.75%, respectively. The power supply rejection (PSR) was 71.65 dB at 100 Hz and 52.54 dB at 10 MHz. The Figure-of-Merit (FOM) for the total variation in output voltage was comparable with representative BJT circuits and better than subthreshold-based MOSFET circuits. Due to low T.C., low process sensitivity, and simplicity of the circuit architecture, the proposed work will be useful for sensor circuits with stringent requirements or other analog circuits that require high precision applications.

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A Design of 10-Bit Asynchronous SAR ADC with an On-Chip Bandgap Reference Voltage Generator

Cited by 4 publications

References 25 publications

Design of a High PSRR Low-pressure Bandgap Reference Source with Curvature Compensation

Design of a High PSRR Low-pressure Bandgap Reference Source with Curvature Compensation

CMOS Analog-to-Digital Converter for Perovskite PV Sensing Applications

Design of Precision-Aware Subthreshold-Based MOSFET Voltage Reference

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