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逐次逼近型模数转换器又称SAR ADC,是通用级模数转换器,可产生连续模拟波形的数字离散时间表示。它们通过电荷再分配过程完成这一任务;在此过程中,已知的定量电荷与ADC输入端获取的电荷量相比较。期间针对所有可能的数字代码(量化电平)执行二进制搜索,最终结果收敛至某一代码,使内部集成的比较器返回平衡状态。0和1的组合表示电路产生的决策序列,使系统回到均衡状态。SAR ADC是通用、易用、完全异步的数据转换
Successive approximation A / D converters, also known as SAR ADCs, are general purpose analog-to-digital converters that produce digital discrete-time representations of continuous analog waveforms. They accomplish this task through the charge redistribution process; in this process, the known quantitative charge is compared to the amount of charge taken at the ADC input. A binary search is performed for all possible digital codes (quantization level) during the final search, and the result converges to a certain code, returning the internal integrated comparator to a balanced state. The combination of 0 and 1 represents the decision sequence generated by the circuit, bringing the system back to equilibrium. SAR ADC is a versatile, easy-to-use, fully asynchronous data conversion