Abstract
A new redundant successive approximation register (SAR) ADC architecture with digital error correction is presented to avoid the comparator offset issue and subtraction operations. A 2-channel 12-bit 100 MS/s SAR ADCs based on the proposed architecture with voltage-controlled delay lines based time-domain comparator is designed in a 65 nm CMOS technology. Simulation results show that at a supply voltage of 1.2 V, the SAR ADC achieves a signal-to-noise-and-distortion ratio (SNDR) of 70.81 dB (11.47 ENOB), a spurious free dynamic range (SFDR) of 80.33 dB for a near Nyquist input at 100 MS/s, while dissipating 11 mW from a 1.2-V supply, giving a FOM of 38.8 fJ/Conversion-step.
References
Baker, R. J. (2011). CMOS: circuit design, layout, and simulation (Vol. 18). Berlin: Wiley-IEEE Press.
Bhandari, S. M., & Aggarwal, S. (1990). A successive double-bit approximation technique for analog/digital conversion. IEEE Transactions on Circuits and Systems, 37(6), 856–858.
Chae, Y., Souri, K. & Makinwa, K. A. (2013). A 6.3 \(\mu \)W 20b incremental zoom-ADC with 6 ppm INL and 1 \(\mu \)V offset. In: Digest of Technical Papers of IEEE International Solid-State Circuits Conference (ISSCC), IEEE, pp. 276–277.
Chen, Y., Tsukamoto, S., & Kuroda, T. (2009). A 9b 100 MS/s 1.46 mW SAR ADC in 65 nm CMOS. In: IEEE Asian Solid-State Circuits Conference (ASSCC), IEEE, pp. 145–148.
Cho, S. H., Lee, C. K., Kwon, J. K., & Ryu, S. T. (2011). A 550-μW 10-b 40-MS/s SAR ADC with multistep addition-only digital error correction. IEEE Journal of Solid-State Circuits, 99, 1–1.
Cline, DW. (1995). Noise, speed, and power trade-offs in pipelined analog to digital converters. PhD thesis, University of California, Berkeley.
Furuta, M., Nozawa, M., & Itakura, T. (2011). A 10-bit, 40-MS/s, 1.21 mW pipelined SAR ADC using single-ended 1.5-bit/cycle conversion. IEEE Journal of Solid-State Circuits, 46(6), 1360–1370.
van der Goes, F., Ward, C., Astgimath, S., Yan, H., Riley, J., Mulder, J., Wang, S. & Bult, K. (2014). A 1.5 mW 68 dB SNDR 80 MS/s 2\(\times \) interleaved SAR-assisted pipelined ADC in 28 nm CMOS. In: Digest of Technical Papers of IEEE International Solid-State Circuits Conference (ISSCC), IEEE, pp. 200–201.
Graupner, A. (2006). A methodology for the offset-simulation of comparators. The Designers Guide Community, www designers-guide org.
Harpe, P., Dolmans, G., Philips, K. & de Groot, H. (2012). A 0.7 V 7-to-10 bit 0-to-2 MS/s flexible SAR ADC for ultra low-power wireless sensor nodes. In: European Solid-State Circuits Conference (ESSCIRC), IEEE, pp. 373–376.
Kim, Y.-H., Lee, J., & Cho, S. H. (2010). A 10-bit 300 MSample/s pipelined ADC using time-interleaved SAR ADC for front-end stages. In: IEEE International Symposium on Circuits and Systems (ISCAS), pp. 4041–4044.
Kobenge, S. B., & Yang, H. (2008). Ultra-low-power high-speed VCDL based time domain comparator. Chinese Patent:ZL2008101145144, pp. 1–10.
Lee, C. (2010). Improving accuracy and energy efficiency of pipeline analog to digital converters. PhD thesis, The University of Michigan, Ann Arbor.
Liu, C. C., Chang, S. J., Huang, G. Y., & Lin, Y. Z. (2010). A 10-bit 50-MS/s SAR ADC with a monotonic capacitor switching procedure. IEEE Journal of Solid-State Circuits, 45(4), 731–740.
Nam, J. W., Jeon, Y. D., Yun, S. J., Roh, T. M. & Kwon, J. K. (2011). A 12-bit 100-MS/s pipelined ADC in 45-nm CMOS. In: International SoC Design Conference (ISOCC), IEEE, pp. 405–407.
Pan, H., Segami, M., Choi, M., Cao, J., Hatori, F. & Abidi, A. A. (2000). A 3.3-V 12b 50-MS/s A/D converter in 0.6-\(\mu \)m CMOS with over 80-dB SFDR. In: Analog Circuit Design (pp. 47–73). Berlin: Springer
Park, J. B., Yoo, S. M., Kim, S. W., Cho, Y. J., & Lee, S. H. (2004). A 10-b 150-MSample/s 1.8-V 123-mW CMOS A/D converter with 400-MHz input bandwidth. IEEE Journal of Solid-State Circuits, 39(8), 1335–1337.
Shin, C. S., & Ahn, G. C. (2011). A 10-bit 100-MS/s dual-channel pipelined ADC using dynamic memory effect cancellation technique. IEEE Transactions on Circuits and Systems II: Express Briefs, 58(5), 274–278.
Tai, H.-Y., Hu, Y.-S., Chen, H.-W., & Chen, H.-S. (2014). A 0.85 fJ/conversion-step 10b 200 kS/s subranging SAR ADC in 40 nm CMOS. In: Digest of Technical Papers of IEEE International Solid-State Circuits Conference (ISSCC), IEEE, pp. 196–197.
Wang, R., Chio, U., Sin, S., Seng-Pan, U., Wang, Z. & Martins, R. (2012). A 12-bit 110 MS/s 4-stage single-opamp pipelined SAR ADC with ratio-based GEC technique. In: European Solid-State Circuits Conference (ESSCIRC), IEEE, pp. 265–268.
Lin, Y. Z., Liu, C. C., Huang, G. Y., Shyu. Y. T. & Chang, S. J. (2010). A 9-bit 150 MS/s 1.53 mW subranged SAR ADC in 90-nm CMOS. In: 2010 Symposium on VLSI Circuits (VLSIC), IEEE, pp. 243–244.
Zhu, Y., Chan, C. H., Sin, S. W., Seng-Pan, U. & Martins, R. P. (2012). A 34 fJ 10b 500 MS/s partial-interleaving pipelined SAR ADC. In: 2012 Symposium on VLSI Circuits (VLSIC), IEEE, pp. 90–91.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Fan, H. A 12-bit 100 MS/s pipelined SAR ADC with addition-only digital error correction. Analog Integr Circ Sig Process 81, 325–339 (2014). https://doi.org/10.1007/s10470-014-0389-7
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10470-014-0389-7