A 1.8V 12-bit 230-MS Pipeline ADC in 0.18um CMOS Technology


This paper describes the implementation of a 12-bit 230 MS/s pipelined ADC using a conventional 1.8 V, 0.18 mum digital CMOS process. Two-stage folded cascode OTA topology is used for improved settling performance. Extreme low-skew (less than 3 ps peak-to-peak) chip-level clock distribution is ensured by five-level balanced clock tree, implemented in low swing current-mode logic. The ADC block achieves a peak SFDR of 71.3 dB and 9.26 ENOB at 230 MS/s, with an input signal swing of 1.5 Vpp. The measured peak SFDR at 200 MS/s is 78 dB, while the peak SNDR at 200 MS/s is 59.5 dB. The SFDR and SNDR performance exhibits very flat characteristics, maintaining higher than 53 dB SNDR at 230 MS/s and higher than 58 dB SNDR at 200 MS/s, from DC through Nyquist rate input frequencies.

In Proceedings of IEEE Asia Pacific Conference on Circuits and Systems


  author = {Liechti, T. and Tajalli, A. and Akgun, O.C. and Toprak, Z. and Leblebici, Y.},
  booktitle = {Proceedings of IEEE Asia Pacific Conference on Circuits and Systems (APCCAS)},
  title = {{A 1.8V 12-bit 230-MS/s Pipeline ADC in 0.18um CMOS Technology}},
  year = {2008},
  pages = {21--24},
  doi = {10.1109/APCCAS.2008.4745950}