A 43mW Single-Channel 4GS/s 4-Bit Flash ADC in 0.18驴m CMOS

摘要

A low-power small-area single-channel 4GS/s 4-bit flash ADC in 0.18 mum CMOS is presented. The entire ADC is implemented using CML blocks. To enhance the speed, both analog (comparators) and digital (encoder) parts of the ADC are fully pipelined. Furthermore, a reformulation for the encoder logic functions is introduced to reduce the wiring delay in the layout. The ADC achieves a figure of merit of 2.14 pJ/conversion-step. The ADC area including the resistor ladder is 0.06 mm² and the power consumption is 43 mW when supplied with 1.8 V.