An Undersampling 14-bit Cyclic ADC

摘要：

An undersampling 14-bit 357 kSps cyclic ADC is designed for radio frequency identification (RFID) transceiver system.Modified passive capacitor error-average (PCEA) technique is adopted for high accuracy. Opamp sharing and the removal of front-end SHA are utilized for low power dissipation and small chip area. The proposed chip is fabricated in a 180 nm CMOS process,and it occupies 0.65 mm×1.6 mm.With 2.431 MHz input,the ADC achieves 70.4 dB signal-to-noise and distortion ration (SNDR),85.6 dB spurious free dynamic range (SFDR) and 11.4 effective number of bits (ENOB).When the input frequency increases to 15.59 MHz,the measured SNDR,SFDR and ENOB are 67.3 dB,88.1 dB and 10.9 bit,respectively.With 3 V supply, it consums 4.2 mW with FOM of 4.3 pJ/Step.

关键词： cyclic ADC modified PCEA opamp sharing undersampling

作者: Weitao Li Fule Li Dandan Guo Chun Zhang Zhihua Wang

作者单位: Institute of Microelectronics,Tsinghua University,Beijing,China Institute of Mieroelectronies,Tsinghua University,Beijing,China Institute of Microeleetronies,Tsinghua University,Beijing,China

会议类型: 国际会议

会议名称: 2009 IEEE 8th International Conference on ASIC(第八届IEEE国际专用集成电路大会)

会议地点: 长沙

会议语种:英文

页码: 211-214

在线出版日期: 2009-10-20（万方平台首次上网日期，不代表论文的发表时间）