A 12-bit 10-GS/s interleaved (IL) pipeline analog-to-digital converter (ADC) is described in this paper. The ADCachieves a signal to noise and distortion ratio (SNDR) of 55 dBand a spurious free dynamic range (SFDR) of 66 dB with a4-GHz input signal, is fabricated in the 28-nm CMOS technology,and dissipates 2.9 W. Eight pipeline sub-ADCs are interleavedto achieve 10-GS/s sample rate, and mismatches between sub-ADCs are calibrated in the background. The pipeline sub-ADCsemploy a variety of techniques to lower power, like avoiding adedicated sample-and-hold amplifier (SHA-less), residue scaling,flash background calibration, dithering and inter-stage gain errorbackground calibration. A push–pull input buffer optimizedfor high-frequency linearity drives the interleaved sub-ADCs toenable>7-GHz bandwidth. A fast turn-ONbootstrapped switchenables 100-ps sampling. The ADC also includes the abilityto randomize the sub-ADC selection pattern to further reduceresidual interleaving spurs.
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