A 4.96-μ W 15-bit Self-Timed Dynamic-Amplifier-Based Incremental Zoom ADC
IEEE Journal of Solid-State Circuits(2023)
摘要
A 15-bit self-timed incremental analog-to-digital converter (ADC) for event-driven applications is presented. It is based on an asynchronous zoom ADC structure and a fully differential self-timed dynamic-amplifier (DA)-based integrator. Dynamic element matching (DEM) and chopping techniques mitigate the mismatch and noise. Measurements show that the ADC without oversampled clock achieves 93-dB SNR in a conversion time of 0.37 ms while consuming only 4.96-
$\mu \text{A}$
current from a 1-V supply. This corresponds to a Schreier FoM of 177.3 dB. The 0.23-mm2 chip was fabricated in a standard 55-nm CMOS process.
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关键词
Asynchronous circuits,delta–sigma modulator,dynamic amplifier (DA),incremental analog-to-digital converter (ADC),low-power circuits,self-timed circuits,zoom ADC
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