The Zoom ADC: An Evolving Architecture

Efraïm Eland; Shubham Mehrotra; Shoubhik Karmakar; Robert van Veldhoven; Kofi A.A. Makinwa

doi:10.1007/978-3-031-28912-5_10

The Zoom ADC: An Evolving Architecture

Efraïm Eland^*, Shubham Mehrotra, Shoubhik Karmakar, Robert van Veldhoven, Kofi A.A. Makinwa

^*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volume › Chapter › Scientific › peer-review

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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.

Original language	English
Title of host publication	Biomedical Electronics, Noise Shaping ADCs, and Frequency References
Subtitle of host publication	Advances in Analog Circuit Design 2022
Publisher	Springer
Pages	179-201
Number of pages	23
ISBN (Electronic)	9783031289125
ISBN (Print)	9783031289118
DOIs	https://doi.org/10.1007/978-3-031-28912-5_10
Publication status	Published - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care
Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Asynchronous
Auto-zeroing
Calibration
Capacitive DAC
Chopping
Common-Mode Feedback (CMFB)
Common-mode Rejection Ratio (CMRR)
Correlated Double Sampling (CDS)
Data Weighted Averaging (DWA)
Delta Sigma Modulator
Dynamic zoom ADC
Finite Impulse Response (FIR)
Floating current source
Inverter-based
Linearity
Loop filter
MASH
Negative resistance
Noise Transfer Function (NTF)
Non-Return-to-Zero (NRZ)
Operational Transconductance Amplifier (OTA)
Pseudo-differential
PVT
Quantization noise leakage
Return-to-Zero (RZ)
SAR ADC
SQNR
Stability
Tail impedance
Tail-Resistor-Linearized (TRL)
Zoom ADC

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1007/978-3-031-28912-5_10

978-3-031-28912-5_10Final published version, 2.56 MB

Cite this

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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.",

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ER -

The Zoom ADC: An Evolving Architecture

Abstract

Bibliographical note

Keywords

UN SDGs

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