High precision voltage reference generator for 16-bit 100MS/s ADC |
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| Authors: | CHEN Zhenhai YU Zongguang LI Xiankun WEI Jinghe HUANG Songren SU Xiaobo |
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| Affiliation: | (1. No.58 Research Institute, China Electronic Technology Group Corporation, Wuxi 214035, China;
2. School of Information Engineering, Huangshan Univ., Huangshan 245041, China;
3. School of Microelectronics, Xidian Univ., Xi'an 710071, China) |
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| Abstract: | An output adjustable voltage reference generator for the 16-bit 100MS/s pipelined ADC is presented. An adjustable output voltage, fast-setting, high precision reference voltage buffer is designed by using current summing and floating current control techniques. In order to further improve the PSRR and reduce the output impedance, the push pull output and replica circuit structure is introduced. The prototype 16-bit 100MS/s ADC is fabricated by 0.18μm 1.8V 1P6M CMOS technology.Test results show that the voltage reference generator consumes an area of 1.3mm×2.0mm, and the power consumption is 23mW. The average temperature coefficient of the output voltage is 16×10-6℃-1 in the range of -55℃ to 125℃. The 16-bit 100MS/s ADC achieves the SNR of 76.3dBFS and SFDR of 89.2dBc, with 10.1MHz input at the full sampling speed, and it consumes the power of 300mW and occupies an area of 3.5mm×5.0mm. |
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| Keywords: | pipelined analog-to-digital converter voltage reference voltage buffer high precision |
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