An 1.2V 440-MS/s 0.13-µm CMOS pipelined Analog-to-Digital Converter with 5-8bit mode selection

In this paper, an 8-bit (with 5-8bit mode selection), 440-MS/s pipelined Analog-to-Digital Converter (ADC) is presented. The ADC utilizes double-sampling in order to relax the operational amplifier (opamp) settling time requirements. Redundant sign digit (RSD) correction compensates offset errors of the comparators. The ADC is designed with a 0.13-µm CMOS process. In the 8-bit mode, measured effective number of bits (ENOB) of the ADC is 6.10 with 162-MHz full-scale input, while the current drawn from 1.2V supply is 83mA.