The Zoom ADC

An Evolving Architecture

Book chapter (2023)

Authors

E.N. Eland Electronic Instrumentation - EEMCS , NXP Semiconductors
S. Karmakar Electronic Instrumentation - EEMCS
Robert van Veldhoven NXP Semiconductors
K.A.A. Makinwa Microelectronics
Research Group
Electronic Instrumentation (EEMCS) (TU Delft)
Copyright: © 2023 E.N. Eland, Shubham Mehrotra, S. Karmakar, Robert van Veldhoven, K.A.A. Makinwa
DOI: https://doi.org/10.1007/978-3-031-28912-5_10
Calibration Stability Chopping Zoom ADC SAR ADC Asynchronous Linearity PVT Delta Sigma Modulator Auto-zeroing Loop filter Capacitive DAC Common-Mode Feedback (CMFB) Common-mode Rejection Ratio (CMRR) Correlated Double Sampling (CDS) Data Weighted Averaging (DWA) Dynamic zoom ADC Finite Impulse Response (FIR) Floating current source Inverter-based MASH Negative resistance Noise Transfer Function (NTF) Non-Return-to-Zero (NRZ) Operational Transconductance Amplifier (OTA) Pseudo-differential Quantization noise leakage Return-to-Zero (RZ) SQNR Tail impedance Tail-Resistor-Linearized (TRL)
More Info
expand_more

Published Date

2023

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Microelectronics

Research Group

Electronic Instrumentation

Abstract

Zoom ADCs combine a coarse SAR ADC with a fine delta-sigma modulator (?SM) to efficiently obtain high energy efficiency and high dynamic range. This makes them well suited for use in various instrumentation and audio applications. However, zoom ADCs also have drawbacks. The use of over-ranging in their fine modulators may limit SNDR, large out-of-band interferers may cause slope overload, and the quantization noise of their coarse ADC may leak into the baseband. This chapter presents an overview of recent advances in zoom ADCs that tackle these challenges while maintaining high energy efficiency. Prototypes designed in standard 0.16 µm technology achieve SNDRs over 100 dB in bandwidths ranging from 1 to 24 kHz while consuming only hundreds of µWs.