SESSION 4 HIGH-SPEED DATA CONVERTERS Session Chair: Boris Murmann, Stanford University, Stanford, CA Associate Chair: Dieter Draxelmayr, Infineon Techologies, Villach, Austria 4.1 A 12b 2.9GS/s DAC with IM3
Monday, February 9th 1:30 PM 4.5 A 600MS/s 30mW 0.13μm CMOS ADC Array Achieving Over 60dB SFDR with Adaptive Digital Equalization 3:45 PM 1 1,2 1,3 3 3 3 3 W. Liu , Y. Chang , S-K. Hsien , B-W. Chen , Y-P. Lee , W-T. Chen , T-Y. Yang , 3 1 G-K. Ma , Y. Chiu 1University of Illinois, Urbana-Champaign, IL 2Jilin University, Changchun, China 3Industrial Technology Research Institute, Hsinchu, Taiwan A 600MS/s 10-way time-interleaved SAR ADC array is fabricated in 0.13μm CMOS. Digital background equalization adaptively corrects the gain, offset, and linearity mismatch in the array, assisted by an algorithmic ADC. The prototype achieves 47.3dB peak SNDR and 65.2dB peak SFDR, while dissipating 30mW from a 1.2V supply. 4.6 A 10b 500MHz 55mW 90nm CMOS ADC 4:15 PM A. Verma, B. Razavi University of California, Los Angeles, CA A pipelined ADC consisting of 14 stages calibrates capacitor mismatch, and nonlinearity and gain error of opamps using an RDAC with 11b linearity. Employing a 2-stage opamp with a BW of 10GHz and a gain of 25, the 90nm digital CMOS ADC achieves a DNL of 0.4 LSB, an INL of 1 LSB and an SNDR of 53dB for a 233MHz input, while drawing 55mW from a 1.2V supply. The FOM is 0.3pJ/conversion-step. 4.7 A 16b 125MS/s 385mW 78.7dB SNR CMOS Pipelined ADC 4:45 PM S. Devarajan, L. Singer, D. Kelly, S. Decker, A. Kamath, P. Wilkins Analog Devices, Wilmington, MA A 16b 125MS/s pipelined ADC implemented in a 0.18μm CMOS process achieves an SNR of 78.7dB, an SNDR of 78.6dB and an SFDR of 96dB with a 30MHz input, while maintaining SNR >76dB and SFDR >80dB up to 150MHz with a clock jitter of 65fs. The ADC has a SHA-less 4b front-end and includes digital calibration and dither to improve small-signal linearity. The ADC consumes 385mW from a 1.8V supply. Conclusion 5:15 PM 23
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