A 1.2-V 250-mW 14-b 100-MS/s Digitally Calibrated Pipeline ADC in 90-nm CMOS

This paper describes a digitally calibrated pipeline analog-to-digital converter (ADC) implemented in 90 nm CMOS technology with a 1.2 V supply voltage. A digital background calibration algorithm reduces the linearity requirements in the first stage of the pipeline chain. Range scaling in the first pipeline stage enables a maximal 1.6 V_pp input signal swing, and a charge-reset switch eliminates ISI-induced distortion. The 14b ADC achieves 73 dB SNR and 90 dB SFDR at 100 MS/s sampling rate and 250 mW power consumption. The 73 dB SNDR performance is maintained within 3 dB up to a Nyquist input frequency and the FOM is 0.68 pJ per conversion-step.