22.1 A 90GS/s 8b 667mW 64&amp;#x00D7; interleaved SAR ADC in 32nm digital SOI CMOS

Kull, Lukas; Toifl, Thomas; Schmatz, M.; Francese, Pier Andrea; Menolfi, Christian; Braendli, Matthias; Kossel, Marcel; Morf, Thomas; Andersen, Tom Løgstrup; Leblebici, Yusuf

doi:10.1109/isscc.2014.6757477

Cited by 92 publications

(25 citation statements)

References 3 publications

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“…The fastest electronic DAC and ADC reported to date are 92 GSa/s [46] and 90 GSa/s [47], respectively, with 8-bit resolution. High sample rates in data converters require tight control of clock jitter since aperture jitter, which is the inability of data converters to sample at precisely defined times, limits sample rate and the effective number of bits (ENOB).…”

Section: Current and Future Challengesmentioning

confidence: 99%

Roadmap of optical communications

Agrell

Karlsson

Chraplyvy³

et al. 2016

J. Opt.

467

268

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Lightwave communications is a necessity for the information age. Optical links provide enormous bandwidth, and the optical fiber is the only medium that can meet the modern society's needs for transporting massive amounts of data over long distances. Applications range from global highcapacity networks, which constitute the backbone of the internet, to the massively parallel interconnects that provide data connectivity inside datacenters and supercomputers. Optical communications is a diverse and rapidly changing field, where experts in photonics, communications, electronics, and signal processing work side by side to meet the ever-increasing demands for higher capacity, lower cost, and lower energy consumption, while adapting the system design to novel services and technologies. Due to the interdisciplinary nature of this rich research field, Journal of Optics has invited 16 researchers, each a world-leading expert in their respective subfields, to contribute a section to this invited review article, summarizing their views on state-of-the-art and future developments in optical communications.

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Section: Current and Future Challengesmentioning

confidence: 99%

Roadmap of optical communications

Agrell

Karlsson

Chraplyvy³

et al. 2016

J. Opt.

467

268

View full text Add to dashboard Cite

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“…6. High-performance DACs and ADCs have already been demonstrated in nanoscale CMOS technologies [15,17,19,21,22,23] and been put into practical use. They have high sampling rates but limited analog bandwidth of less than about 20 GHz.…”

Section: Data Converters: Dac and Adcmentioning

confidence: 99%

High-performance compound-semiconductor integrated circuits for advanced digital coherent optical communications systems

Nagatani

Nosaka

2016

IEICE Electron. Express

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Communications traffic over photonic networks is exponentially increasing due to the spread of broadband applications. To cope with the rapid growth, novel 100-Gb/s digital coherent systems have been deployed recently in optical core networks. Further research and development of digital coherent technologies with channel rates of beyond 100 Gb/s is now being conducted. Optical transceivers for such high-speed communications systems need high-performance analog and mixed-signal electronic circuits such as optical modulator drivers, transimpedance amplifiers (TIAs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs). Compound-semiconductor integrated circuits (ICs) have played key roles in this technical field. This paper reviews recent trends in compound-semiconductor ICs for such advanced digital coherent optical communications systems and presents our latest results based on InP heterojunction bipolar transistor (HBT) technology.

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“…Based on the SAR ADC, an interleaved ADC architecture is presented that achieves the specifications required for the optical communication standard ITU-OTU4 [12]. The ADC achieves up to 100 GS/s at less than 1 W. First the ADC architecture is highlighted before the core component of the 649 interleaved ADC, the interleaver, is described in detail.…”

Section: Interleaved Sar Adcmentioning

confidence: 99%

Energy-Efficient High-Speed SAR ADCs in CMOS

Kull

Toifl

Schmatz

et al. 2014

High-Performance AD and DA Converters, IC Design in Scaled Technologies, and Time-Domain Signal Processing

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An ADC featuring a new architecture for an 8 b 649 interleaved CMOS ADC running at up to 100 GHz sampling frequency is presented. The ADC fulfills all specifications for 100 Gb/s ITU-OTU4 communication over long-distance optical fiber channels. It is based on a SAR ADC, known for its superior energy efficiency and suitability for deep-submicron digital CMOS processes, as the comparator is the only true analog element. Several improvements to existing SAR ADC architectures are presented. Alternate comparators are used to increase the sampling speed at no power and area penalty, and dynamic memory is used to reduce latency in the CDAC feedback. A deep-trench capacitor-based reference buffer significantly reduces power at low output impedance, and a differential CDAC with constant common mode and fractional reference voltages optimizes comparator performance and silicon area. The 649 interleaved ADC consists of a dedicated sampling and interleaving block and 64 SAR ADCs. Four interleaved passive samplers based on a sampling switch with in-line 1:4 demultiplexer provide an initial 1:16 interleaving with high linearity and more than 20 GHz input bandwidth while using only a single supply voltage.

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22.1 A 90GS/s 8b 667mW 64× interleaved SAR ADC in 32nm digital SOI CMOS

Cited by 92 publications

References 3 publications

Roadmap of optical communications

Roadmap of optical communications

High-performance compound-semiconductor integrated circuits for advanced digital coherent optical communications systems

Energy-Efficient High-Speed SAR ADCs in CMOS

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