Binary-Weighted DAC using W-2W Current Mirror Topology

Abstract

The paper presents an analysis and design of 3bit, 4-bit and 6-bit Binary-Weighted CMOS Digital to Analog Converters (DACs). All the DACs are implemented using various CMOS technologies such as 180 nm, 90 nm and 45 nm with the supply of 1.8 V. The INLs, DNLs and Power dissipation of each DAC is compared and analyzed. As the transistor sizing is scaled down, the area occupied by DACs decreases; resulting in lower power dissipation. Even INLs and DNLs are decreased with transistor scaling. Thus, as the technology is scaled down, the design archives a good trade-off between low INL, DNL and Power dissipation.