A 440μW, 109.8dB DR, 106.5dB SNDR Discrete-Time Zoom ADC with a 20kHz BW
E.N. Eland (TU Delft - Electronic Instrumentation)
Shoubhik Karmakar (TU Delft - Electronic Instrumentation)
B. Gonen (TU Delft - Electronic Instrumentation)
R. van Veldhoven (NXP Semiconductors)
K. A.A. Makinwa (TU Delft - Microelectronics)
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Abstract
This paper presents a discrete-time (DT) zoom ADC for audio applications. A 2b quantizer in combination with a low power “fuzz” suppression technique, results in a significant improvement in linearity and energy-efficiency over previous designs. The ADC occupies 0.27mm 2 in 0.16μm CMOS and consumes 440μW from a 1.8V supply. In a 20kHz BW, it achieves 109.8dB DR and 106.5dB SNDR, resulting in a state-of-the-art Schreier FoM of 186.4dB.