A programmable MDAC with power scalability  

作　　者：刘术彬 朱樟明 杨银堂 刘帘羲 

机构地区：[1]School of Microelectronics, Xidian University

出　　处：《Journal of Semiconductors》2014年第1期140-145,共6页半导体学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.61234002,61006028);the National High-Tech Program of China(Nos.2012AA012302,2013AA014103);the PhDProgram Foundation of Ministry of Education of China(No.20120203110017)

摘　　要：A programmable high precision multiplying DAC （MDAC） is proposed. The MDAC incorporates a frequency-current converter （FCC） to adjust the power versus sampling rate and a programmable operational am- plifier （POTA） to achieve the tradeoff between resolution and power of the MDAC, which makes the MDAC suitable for a 12 bit SHA-less pipelined ADC. The prototype of the proposed pipelined ADC is implemented in an SMIC CMOS 0.18 μm 1P6M process. Experimental results demonstrate that power of the proposed ADC varies from 15.4 mW （10 MHz） to 63 mW （100 MHz） while maintaining an SNDR of 60.5 to 63 dB at all sampling rates. The differential nonlinearity and integral nonlinearity without any calibration are no more than 2.2/-1 LSB and 1.6/-1.9 LSB, respectively.A programmable high precision multiplying DAC （MDAC） is proposed. The MDAC incorporates a frequency-current converter （FCC） to adjust the power versus sampling rate and a programmable operational am- plifier （POTA） to achieve the tradeoff between resolution and power of the MDAC, which makes the MDAC suitable for a 12 bit SHA-less pipelined ADC. The prototype of the proposed pipelined ADC is implemented in an SMIC CMOS 0.18 μm 1P6M process. Experimental results demonstrate that power of the proposed ADC varies from 15.4 mW （10 MHz） to 63 mW （100 MHz） while maintaining an SNDR of 60.5 to 63 dB at all sampling rates. The differential nonlinearity and integral nonlinearity without any calibration are no more than 2.2/-1 LSB and 1.6/-1.9 LSB, respectively.

关 键 词：pipelined ADC MDAC frequency-current converter power scalability programmable OTA 

分 类 号：TM46[电气工程—电器]