Microelectronics, Volume. 53, Issue 5, 752(2023)
A Second-Order Noise-Shaping SAR ADC with Segmented Dynamic Element Matching
A high-resolution and low-power noise-shaping SAR ADC with segmented dynamic element matching (DEM) was designed. It realized a second-order noise-shaping filter with passive gain to enhance the noise-shaping capability. Besides, a segmented DEM circuit was proposed to solve the problem of harmonic distortion caused by the DAC capacitor mismatch to further improve the signal-to-noise-and-distortion ratio (SNDR) of the ADC. The simulation results show that the designed noise-shaping SAR ADC achieves 91.1 dB SNDR at the sampling rate of 4 MS/s and the oversampling ratio (OSR) of 40. The designed ADC consumes 231 μW at 1.8 V supply voltage, achieving Schreier figure of merit (FOM) of 174.5 dB.
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YANG Song, DUAN Jihai, LI Ji, YIN Renchuan. A Second-Order Noise-Shaping SAR ADC with Segmented Dynamic Element Matching[J]. Microelectronics, 2023, 53(5): 752
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Received: Oct. 9, 2022
Accepted: --
Published Online: Jan. 3, 2024
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