A 12-GS/s Phase-Calibrated CMOS Digital-to-Analog Converter

Abstract

A 12-GS/s 8-bit Digital-to-Analog Converter (DAC) enables 24 Gb/s signaling over conventional backplane channels. Designed in a 90-nm CMOS process, the circuit occupies an area of 670 mum times 350mum and achieves INL and DNL of 0.31 and 0.28 LSB. Measured SNDR and SFDR are 41 dB and 51 dB at 750 MHz and 32.5 dB and 35 dB at 1.5 GHz. The power dissipation is 190 mW from 1-V and 1.8-V power supplies.