A 65-nm low-power high-linearity Σ△ ADC for audio applications  

作　　者：LIAO Lu SUN Ying HAN Yan LIANG Guo LUO Hao LIU XiaoPeng 

机构地区：[1]Institute of Microelectronics and Photoelectronics, Zhejiang University

出　　处：《Science China(Information Sciences)》2014年第4期197-203,共7页中国科学（信息科学）（英文版）

基　　金：supported by Ph.D.Programs Foundation of the Ministry of Education of China(Grant No.20100101110063);Incubation Programs of Innovation and Carve out of Zhejiang Province;ICC for kindly supporting the chip fabrication process

摘　　要：This paper presents a low-power high linearity ∑△ analog-to-digital converter （ADC） for audio applications. By adopting low noise large output swing operational amplifiers in a 2-1 cascaded modulator, not only can the noise floor be reduced, but the input signal range can also be enlarged. A low-power, area-efficient digital decimation filter was also designed to decrease the area and the power cost. The ADC was fabricated in the SMIC 65 nm single-poly-eight-metal （1P8M） mixed-signal complementary metal-oxide-semiconductor （CMOS） process with a die area of 0.36 mm2. Measurement results showed that a 90 dB peak signal to noise plus distortion ratio （SNDR） and a 93 dB dynamic range （DR） were achieved over the 22.05 kHz audio band. The power dissipation was 2.2 mW from 1.2 V power supply, which is suitable for audio codec applications.This paper presents a low-power high linearity ∑△ analog-to-digital converter （ADC） for audio applications. By adopting low noise large output swing operational amplifiers in a 2-1 cascaded modulator, not only can the noise floor be reduced, but the input signal range can also be enlarged. A low-power, area-efficient digital decimation filter was also designed to decrease the area and the power cost. The ADC was fabricated in the SMIC 65 nm single-poly-eight-metal （1P8M） mixed-signal complementary metal-oxide-semiconductor （CMOS） process with a die area of 0.36 mm2. Measurement results showed that a 90 dB peak signal to noise plus distortion ratio （SNDR） and a 93 dB dynamic range （DR） were achieved over the 22.05 kHz audio band. The power dissipation was 2.2 mW from 1.2 V power supply, which is suitable for audio codec applications.

关 键 词：MODULATOR decimation filter LOW-POWER LINEARITY audio ADC 

分 类 号：TN792[电子电信—电路与系统]