A Dynamic Zoom ADC with 109-dB DR for Audio Applications
Burak Gönen (TU Delft - Electronic Instrumentation)
Fabio Sebastiano (TU Delft - (OLD)Applied Quantum Architectures)
Rui Quan (NXP Semiconductors)
Robert van Veldhoven (NXP Semiconductors)
Kofi A.A. Makinwa (TU Delft - Microelectronics)
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Abstract
This paper presents the first dynamic zoom ADC. Intended for audio applications, it achieves 109-dB DR, 106-dB signal-to-noise ratio, and 103-dB SNDR in a 20-kHz bandwidth, while dissipating only 1.12 mW. This translates into the state-of-the-art energy efficiency as expressed by a Schreier FoM of 181.5 dB. It also achieves the state-of-the-art area efficiency, occupying only 0.16 mm2 in the 0.16- μm CMOS. These advances are enabled by the use of concurrent fine and coarse conversions, dynamic error-correction techniques, and a dynamically biased inverter-based operational transconductance amplifier.