一种单电源供电的十位双积分A/D转换器

An individual power supplied 10 bit double-integral A/D converter

设计了一种改进的双积分A/D转换器,通过采取2种模式积分的方法实现了+5V单电源供电,克服了传统双积分A/D转换器需要双电源的弊端。重点考虑可处理输入信号范围以及功耗的优化,并使用栅压自举开关保证了A/D转换的精度。整体电路设计基于CSMC0.5μm 2P3M CMOS工艺,使用Cadence Spectre进行仿真,在5V供电情况下达到10bit精度,转换速率>10Kb/s,输入电压范围达到0~5V,INL<1/2LSB,系统功耗2.636mW。

An improved double-integral A/D converter was designed. By using two modes of integration, a ＋5 V individual power supply was realized to overcome the traditional ADC＇s shortcoming that need double power. Foucusing on input signal range and power consumption optimization, while a gate voltage bootstrapped switch uhilized to ensures the ADC＇s precision. Design based on CSMC 0.5 I^m 2P3M CMOS process. Simulating with Cadence Spectre shows 10 bit accuracy, conversion rate 〉10 Kb/s, input voltage range 0-5 V, INL 〈1/2 LSB, system power dissipation 2.636 mW was achieved in the case of 5 V supply.