A 30 GS/s 4-Bit Binary Weighted DAC in SiGe BiCMOS Technology

This paper presents a 4-bit 30 GS/S binary weighted DAC in 0.25 μm BiCMOS technology. The binary weighting function was implemented in the load resistor instead of the current sources. This DAC showed 0.49 LSB and 0.57 LSB of INL and DNL respectively. 0.92 pJ FOM was achieved with 3.5V of power supply at a conversion rate of 30 GHz.