A 10-bit 205-MS/s 1.0-mm/5090-nm CMOS Pipeline ADC for Flat Panel

Abstract

This paper describes a 10-bit 205-MS/s pipeline analog-to-digital converter (ADC) for flat panel display applica- tions with the techniques to alleviate the design limitations in the deep-submicron CMOS process. The switched source follower combined with a resistor-switch ladder eliminates the sampling switches and achieves high linearity for a large single-ended input signal. Multistage amplifiers adopting the complementary common-source topology increase the output swing range with lower transconductance variation and reduce the power con- sumption. The supply voltage for the analog blocks is provided by the low drop-out regulator for a high power-supply rejec- tion ratio (PSRR) under the noisy operation environment. The pipeline stages of the ADC are optimized in the aspect of power consumption through the iterated calculation of the sampling capacitance and transconductance. The ADC occupies an ac- tive area of 1.0 mm /50in a 90-nm CMOS process and achieves a 53-dB PSRR for a 100-MHz noise tone with the regulator and a 55.2-dB signal-to-noise-and-distortion ratio for a 30-MHz 1.0-V /80/80 single-ended input at 205 MS/s. The ADC core dissipates 40 mW from a 1.0-V nonregulated supply voltage.