A Dynamic Zoom ADC With 109-dB DR for Audio Applications

作者：Gonen Burak^*; Sebastiano Fabio; Quan Rui; van Veldhoven Robert; Makinwa Kofi A A

来源：IEEE Journal of Solid-State Circuits, 2017, 52(6): 1542-1550.

DOI：10.1109/JSSC.2017.2669022

• Audio
• compact ADC
• delta sigma
• discrete time
• dynamic
• dynamic range (DR)
• hybrid ADC
• precision
• zoom ADC

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 stateof- 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 mm(2) in the 0.16-mu m 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.

• 出版日期2017-6