An Area-Aware Figure of Merit for Improved State-of-the-Art Comparison of Analog-to-Digital Converters

Authors

Keywords:

Figure-of-Merit, Analog-to-Digital Converters, Area, Resolution, Bandwidth, Power dissipation.

Abstract

This paper introduces a new Figure-of-Merit (FoM) for Analog-to-Digital Converters (ADCs) that integrates silicon area alongside the traditional metrics of resolution, bandwidth, and power dissipation. As technology scaling and system-on-chip integration make area efficiency a critical design constraint, the established Walden and Schreier FoM's provide an incomplete comparison of state-of-the-art performance. The proposed Area-Aware FoM (FoM$_{\text{A}}$) enables a more integral and equitable benchmarking by directly quantifying the trade-off between dynamic performance and physical implementation cost. The validity and utility of the FoM$_{\text{A}}$ are demonstrated through a re-evaluation of over 40 published ADCs, revealing significant shifts in architectural ranking and offering designers a more relevant metric for advanced technology nodes.

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Author Biographies

Mauricio Velazquez-Diaz, National Institute for Astrophysics Optics and Electronics, Puebla, Mexico.

Mauricio Velazquez-Diaz received his B.Sc. degree in Electronic Engineering at the Autonomous University of Puebla, Mexico in 2019. He also received his M.Sc. degree in Electronic Circuit Design at National Institute of Astrophysics, Optics and Electronics (INAOE), Mexico in 2021. He is currently finishing his Ph.D. degree at INAOE. In 2024 he completed an Internship at Microelectronics Circuits Centre Ireland, Tyndal, in Ireland, and since 2025, he has been a research assistant. His research interests include Analog and Mixed Integrated Circuit Design, Robust Design, ADC converters for specific applications and Cryo-CMOS systems.

Victor Rodolfo Gonzalez-Diaz, Autonomous University of Puebla (BUAP)

Victor Rodolfo Gonzalez-Diaz received the M. Sc. and Ph. D. at the National Institute for Astrophysics, Optics, and Electronics (INAOE) Puebla México; in 2005 and 2009, respectively. He collaborated as a postdoc fellow at the Microsystems Laboratory of the University of Pavia, Italy, in 2009-2010; and works as a full-time professor at the Faculty of Electronics BUAP, Puebla, since 2011. He is the founder and head of the Circuits and Systems Characterization Laboratory at the same Faculty. Dr. Gonzalez-Diaz participates as an associate editor in IEEE TCAS-II express briefs. His research interests include the design of analog and mixed-signal integrated circuits focusing on analog-to-digital converter design, frequency synthesizers, and micropower management circuits.

Guillermo Espinosa Flores-Verdad

Guillermo Espinosa Flores-Verdad obtained the M.Sc. degree from INAOE, Mexico, and the Ph.D. degree from Pavia University, Italy in 1983 and 1989. From 1990 to 1993 he worked in the Central Research and Development Department at SGS- THOMSON Microelectronics Corp., Italy, as head of the Analog Library Automation Group. In February 1993, he joined the Electronics Department at the National Institute of Astrophysics, Optics and Electronics (INAOE), Mexico as a Professor Researcher. He was with Freescale Semiconductor from 2005 to 2008 leading the Freescale Mexico Technology Center. Since 2008, he is, again, at INAOE Electronics Department as a Professor Researcher. His main research interests are in Analog and Mixed Integrated Circuit Design and CAD development for the automatic design, synthesis, analysis and layout of ICs.

References

R. H. Walden, “Analog-to-digital converter survey and analysis,” IEEE

J.Sel. A. Commun., vol. 17, no. 4, p. 539–550, Apr. 1999. [Online].

Available: https://doi.org/10.1109/49.761034

S. Pavan, R. Schreier, and G. C. Temes, Understanding Delta-Sigma

Data Converters. Wiley-IEEE Press, 2017.

B. E. Jonsson, “Using figures-of-merit to evaluate measured a/d-

converter performance,” in 2011 International Workshop on ADC

Modelling, Testing and Data Converter Analysis and Design, 2011.

[Online]. Available: https://api.semanticscholar.org/CorpusID:4945437

J. Sauerbrey, T. Tille, D. Schmitt-Landsiedel, and R. Thewes, “A 0.7v

mosfet-only switched-opamp /spl sigma//spl delta/ modulator,” in 2002

IEEE International Solid-State Circuits Conference. Digest of Technical

Papers (Cat. No.02CH37315), vol. 1, 2002, pp. 310–469 vol.1.

M. Kwon and B. Murmann, “A new figure of merit equation for analog-

to-digital converters in cmos image sensors,” in 2018 IEEE International

Symposium on Circuits and Systems (ISCAS), 2018, pp. 1–5.

M. J. Pelgrom, Analog to Digital Conversion. Stiphout, Netherlands:

Springer, 2022.

B. Murmann, “ADC Performance Survey 1997-2025,” [Online]. Avail-

able: https://github.com/bmurmann/ADC-survey.

B. G¨onen, F. Sebastiano, R. Quan, R. van Veldhoven, and K. A. A.

Makinwa, “A dynamic zoom adc with 109-db dr for audio applications,”

IEEE Journal of Solid-State Circuits, vol. 52, no. 6, pp. 1542–1550,

P. Harpe, “A 0.0013mm2 10b 10ms/s sar adc with a 0.0048mm2 42db-

rejection passive fir filter,” in 2019 IEEE Custom Integrated Circuits

Conference (CICC), 2019, pp. 1–4.

M. Jang, C. Lee, and Y. Chae, “9.2 a 134uw 24khz-bw 103.5db-dr ct ds

modulator with chopped negative-r and tri-level fir dac,” in 2020 IEEE

International Solid-State Circuits Conference - (ISSCC), 2020, pp. 1–3

J. Hu, D. Li, M. Liu, and Z. Zhu, “A 10-ks/s 625-hz-bandwidth

-db sndr second-order noise-shaping sar adc for biomedical sensor

applications,” IEEE Sensors Journal, vol. 20, no. 23, pp. 13 881–13 891,

Y.-J. Jo, J. E. Kim, K.-H. Baek, and T. T.-H. Kim, “A 0.007 mm2 0.6

v 6 ms/s low-power double rail-to-rail sar adc in 65-nm cmos,” IEEE

Transactions on Circuits and Systems II: Express Briefs, vol. 68, no. 9,

pp. 3088–3092, 2021.

E. Eland, S. Karmakar, B. G¨onen, R. van Veldhoven, and K. A. A.

Makinwa, “A 440-uw, 109.8-db dr, 106.5-db sndr discrete-time zoom

adc with a 20-khz bw,” IEEE Journal of Solid-State Circuits, vol. 56,

no. 4, pp. 1207–1215, 2021.

C. Lo, J. Lee, Y. Lim, Y. Yoon, H. Hwang, J. Lee, M. Choi, M. Lee,

S. Oh, and J. Lee, “10.1 a 116u w 104.4db-dr 100.6db-sndr ct ds audio

adc using tri-level current-steering dac with gate-leakage compensated

off-transistor-based bias noise filter,” in 2021 IEEE International Solid-

State Circuits Conference (ISSCC), vol. 64, 2021, pp. 164–166.

Y. Kwon, B. Min, J. Lee, W. Lee, and S. Yang, “An 8.1 enob 10bit

ms/s pipelined adc using sar and sub-ranging flash,” in 2021 IEEE

International Symposium on Circuits and Systems (ISCAS), 2021, pp.

–5.

Y. Shen, H. Li, E. Cantatore, and P. Harpe, “A 2.2 fj/conversion-step

74-enob 10 ms/s sar adc with 1.5×input range,” IEEE Transactions on

Circuits and Systems II: Express Briefs, vol. 69, no. 9, pp. 3660–3664,

J. Steensgaard, R. Reay, R. Perry, D. Thomas, G. Tu, and G. Reitsma, “A

b 2ms/s sar adc with 0.03ppm inl and 106.3db dr in 180nm cmos,”

in 2022 IEEE International Solid-State Circuits Conference (ISSCC),

vol. 65, 2022, pp. 168–170.

M. K. Adimulam and M. B. Srinivas, “A 12-bit, 1.1-gs/s, low-power

flash adc,” IEEE Transactions on Very Large Scale Integration (VLSI)

Systems, vol. 30, no. 3, pp. 277–290, 2022.

S. Mehrotra, E. Eland, S. Karmakar, A. Liu, B. G¨onen, M. Bolatkale,

R. Van Veldhoven, and K. A. Makinwa, “A 590 uw, 106.6 db sndr, 24

khz bw continuous-time zoom adc with a noise-shaping 4-bit sar adc,”

in ESSCIRC 2022- IEEE 48th European Solid State Circuits Conference

(ESSCIRC), 2022, pp. 253–256.

C. Y. Lee and U.-K. Moon, “A 0.0375mm2 203.5uw 108.8db dr dt

single-loop dsm audio adc using a single-ended ring-amplifier-based

integrator in 180nm cmos,” in 2022 IEEE International Solid-State

Circuits Conference (ISSCC), vol. 65, 2022, pp. 412–414.

H.-H. Chang, T.-C. Lin, and T.-C. Lee, “A single-channel 1-gs/s 7.48-

enob parallel conversion pipelined sar adc with a varactor-based residue

amplifier,” IEEE Transactions on Circuits and Systems II: Express Briefs,

vol. 69, no. 4, pp. 2021–2025, 2022.

K. Pelzers, M. van der Struijk, and P. Harpe, “A 0.0022 mm² 10 bit 20

ms/s sar adc with passive single-ended-to-differential-converter,” IEEE

Transactions on Circuits and Systems I: Regular Papers, vol. 70, no. 1,

pp. 29–39, 2023.

X. Xu, Y. Shui, and A. Wang, “A 0.0025mm2 8-bit 70ms/s sar adc

with a linearity-improved bootstrapped switch for computation in mem-

ory,” in 2023 8th International Conference on Integrated Circuits and

Microsystems (ICICM), 2023, pp. 412–416.

Y. Shen, H. Li, E. Cantatore, and P. Harpe, “A 0.0033 mm2 3.5

fj/conversion-step sar adc with 2× input range boosting,” in 2023 IEEE

International Symposium on Circuits and Systems (ISCAS), 2023, pp.

–5.

Z. Zhang, M. Cheng, Y. Yu, Q. Yu, K. Wu, and N. Ning, “A

053 mm2 10-bit 10-ks/s 40-nw sar adc with pseudo single ended

switching procedure for bio-related applications,” Microelectronics

Journal, vol. 139, p. 105868, 2023. [Online]. Available: https:

//www.sciencedirect.com/science/article/pii/S0026269223001817

Y.-H. Tsai and S.-I. Liu, “A 0.0072-mm2 10-bit 100-ms/s calibration-

free sar adc using digital place-and-route tools in 40-nm cmos,” in 2023

International VLSI Symposium on Technology, Systems and Applications

(VLSI-TSA/VLSI-DAT), 2023, pp. 1–4.

J. Cui, S. Ye, J. Gao, X. Xu, Y. Luan, J. Li, Z. Chen, Y. He, R. Huang,

L. Ye, and L. Shen, “A 0.0045 mm2 31.5uw 312.5khz-bw 2nd-order

noise-shaping sar adc with a dynamic-bulkswitching single-transistor

amplifier,” in 2024 IEEE European Solid-State Electronics Research

Conference (ESSERC), 2024, pp. 373–376.

J.-T. Lin, Y.-H. Liao, M. Akbari, and K.-T. Tang, “A 0.9 v adaptive

sampling rate differential level crossing-sar adc for biomedical signal

acquisition system,” in 2024 IEEE Asia Pacific Conference on Circuits

and Systems (APCCAS), 2024, pp. 549–553.

K.-C. Cheng, S.-J. Chang, C.-C. Chen, and S.-H. Hung, “A 94.3-db sndr

-db foms 4th-order noise-shaping sar adc with dynamic-amplifier-

assisted cascaded integrator,” IEEE Solid-State Circuits Letters, vol. 8,

pp. 65–68, 2025.

Y. Choi, W. Lee, S. Park, C. Kim, H. Jung, and C. Kim, “A 101.6-db-

sndr fully dynamic zoom adc using miller-compensated floating inverter

amplifiers,” IEEE Transactions on Circuits and Systems II: Express

Briefs, vol. 71, no. 9, pp. 4141–4145, 2024.

Q. Wu, S. Li, and Z. Hong, “A 114.5-db dr, 184.6-db fomdr discrete-time

self-zoom adc,” IEEE Transactions on Circuits and Systems II: Express

Briefs, vol. 71, no. 9, pp. 4076–4080, 2024.

K. Sun, J. Liu, F. Yan, H. Sun, Y. Zhang, Y. Ren, L. Huang, Y. Pi, W. Wu,

and J. Guan, “A 9.68nw 57.51db sndr sar adc with dual bypass windows

based on non-binary split capacitors for biomedical applications,” IEEE

Transactions on Biomedical Circuits and Systems, vol. 19, no. 6, pp.

–1104, 2025.

M. Tambussi, M. Grassi, G. Rocca, S. Valle, M. Grandi, E. Bonizzoni,

and P. Malcovati, “A quasi-passive 78-db dr 14.9- uw noise-shaping sar

a/d converter for audio activity detection applications,” IEEE Transac-

tions on Circuits and Systems II: Express Briefs, vol. 72, no. 12, pp.

–1856, 2025.

Y. Tao, M. Zhan, M. Gu, X. He, Y. He, Z. Zhang, Y. Zhong, L. Jie,

and N. Sun, “An 8b 10gs/s 2-channel time-interleaved pipelined adc with

concurrent residue transfer and quantization, and automatic buffer power

gating,” in 2025 IEEE International Solid-State Circuits Conference

(ISSCC), vol. 68, 2025, pp. 440–442.

J. Zhong, M. Zhang, Y. Zhu, R. P. Martins, and C.-H. Chan, “24.3:

A pvt-robust 2× interleaved 2.2gs/s adc with gated-ccro-based quantizer

shared across channels and steps achieving ¿4.5ghz erbw,” in 2025 IEEE

International Solid-State Circuits Conference (ISSCC), vol. 68, 2025, pp.

–434.

Y. Luan, X. Xu, J. Gao, J. Cui, Z. Chen, S. Ye, R. Huang, and L. Shen,

“18.2 a 12.2uw 99.6db-sndr 184.8db-foms dt zoom ppd dsm with gain-

embedded bootstrapped sampler,” in 2025 IEEE International Solid-

State Circuits Conference (ISSCC), vol. 68, 2025, pp. 308–310.

Y. Cao, Y. Shen, S. Liu, H. Han, H. Liang, L. Dang, D. Li, R. Ding, and

Z. Zhu, “24.2 a 14b 1gs/s single-channel pipelined adc with a parallel-

operation sar sub-quantizer and a dynamic-deadzone ring amplifier,”

in 2025 IEEE International Solid-State Circuits Conference (ISSCC),

vol. 68, 2025, pp. 430–432.

M. Gu, Y. Zhong, L. Jie, and N. Sun, “24.1 a 12b 3gs/s pipelined

adc with gated-lms-based piecewise-linear nonlinearity calibration,”

IEEE International Solid-State Circuits Conference (ISSCC),

vol. 68, pp. 1–3, 2025. [Online]. Available: https://api.semanticscholar.

org/CorpusID:276842044

B. Veraverbeke and F. Tavernier, “18.8 a cryo-cmos 800ms/s 7b ci-

sar with only 4ff input capacitance and 64db sfdr,” in 2025 IEEE

International Solid-State Circuits Conference (ISSCC), vol. 68, 2025,

pp. 1–3.

S. Huang, Z. Zhang, X. He, M. Gu, Y. Tao, Y. Zhong, N. Sun, and L. Jie,

“A 70db sndr 80mhz bw filter-embedded pipeline-sar adc achieving

db foms with progressive conversion and floating-charge-transfer

amplifier,” in 2025 IEEE International Solid-State Circuits Conference

(ISSCC), vol. 68, 2025, pp. 318–320.

C. Xing, Y. Zhong, N. Sun, and L. Jie, “A 94.4db-sndr 500khz-bw multi-

rate mash 0-1-0 adc with easy-to-drive capacitive input and deadband-

embedded gm-c loop filter,” in 2025 Symposium on VLSI Technology

and Circuits (VLSI Technology and Circuits), 2025, pp. 1–3.

X. Wang, Z. Zhang, Y. Zhong, N. Sun, and L. Jie, “A 0.0035mm286db-

snr 1.25mhz-bw noise-shaping sar adc enabling kt/c noise shaping,” in

Symposium on VLSI Technology and Circuits (VLSI Technology

and Circuits), 2025, pp. 1–3.

R. Cents, H. S. Bindra, H. De Vree, and B. Nauta, “A 0.5-0.8v 10-85

ms/s 12-bit sar adc in 22nm fdsoi utilizing an inverter-based comparator

architecture,” in 2025 Symposium on VLSI Technology and Circuits

(VLSI Technology and Circuits), 2025, pp. 1–3.

H. Li, K. Zhang, L. Qi, S.-W. Sin, R. P. Martins, and M. Guo, “A pvt-

robust 16GS/s4×TI time-domain adc with vernier-based multipath flash

tdc achieving 25.7fJ/c − s fom in 28nm cmos,” in 2025 Symposium on

VLSI Technology and Circuits (VLSI Technology and Circuits), 2025,

pp. 1–3.

J. Yoon and Y. Chae, “A 91.2db-sndr 250khz-bw ct zoom adc achieving

a 6-bit linear zoom-in with interstage lpf and 1.5-bit dac,” in 2025

Symposium on VLSI Technology and Circuits (VLSI Technology and

Circuits), 2025, pp. 1–3.

S. Lee, J. Yoon, T. Jeon, D. Ahn, S. Yun, H. Y. Kim, J. Bae, and Y. Chae,

“A 10khz-bw, 86.7db-sndr, 176.8db-fom, lna-embedded ct ∆Σ adc for

closed-loop neural recording,” in 2025 Symposium on VLSI Technology

and Circuits (VLSI Technology and Circuits), 2025, pp. 1–3

Published

2026-06-12

How to Cite

Velazquez-Diaz, M., Gonzalez-Diaz, V. R., & Espinosa Flores-Verdad, G. (2026). An Area-Aware Figure of Merit for Improved State-of-the-Art Comparison of Analog-to-Digital Converters. IEEE Latin America Transactions, 24(8), 846–854. Retrieved from https://latamt.ieeer9.org/index.php/transactions/article/view/10640

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Section

Electronics