A 99.93% energy-efficient switching scheme for SAR ADC without switching energy in the first three MSBs

Yu, Zhe; Liang, Yuhua

doi:10.1016/j.mejo.2023.105771

Cited by 1 publication

(1 citation statement)

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“…The analog-to-digital converter (ADC) is one of the core modules of the electronic terminal equipment; it can realize the conversion of analog signals to digital signals. The successive approximation analog-to-digital converter (SAR ADC) is suitable for low power consumption applications due to its simple structure, high speed, and low power consumption [ 1 , 2 , 3 , 4 , 5 ]. This design proposes a 9-10-bit adjustable scheme and designs a bit-count control circuit [ 6 ].…”

Section: Introductionmentioning

confidence: 99%

A 9-10-Bit Adjustable and Energy-Efficient Switching Scheme for Successive Approximation Register Analog-to-Digital Converter with One Least Significant Bit Common-Mode Voltage Variation

Hu,

Chen,

et al. 2024

Sensors

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A 9-10-bit adjustable and energy-efficient switching scheme for SAR ADC with one-LSB common-mode voltage variation is proposed. Based on capacitor-splitting technology and common-mode conversion techniques, the proposed switching scheme reduces the DAC switching energy by 96.41% compared to the conventional scheme. The low complexity and the one-LSB common-mode voltage offset of this scheme benefit from the simultaneous switching of the reference voltages of the capacitors corresponding to the positive array and the negative array throughout the entire reference voltage switching process, and the reference voltage of each capacitor in the scheme does not change more than two voltages. The post-layout result shows that the ADC achieves the 54.96 dB SNDR, the 61.73 dB SFDR, and the 0.67 μw power consumption with the 10-bit mode and the 48.33 dB SNDR, the 54.17 dB SFDR, and the 0.47 μw power consumption with the 9-bit mode in a 180 nm process with a 100 kS/s sampling frequency.

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