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ADS58B19如何采样直流信号?

Other Parts Discussed in Thread: ADS58B19, TSW1265EVM

以下是ADS58B19的产品手册上推荐的外围电路图,此电路将不能用于电容和变压器的存在,将滤除直流部分,无法采样直流部分。类比示波器,示波器有DC档和AC档, 此ADC仅支持AC档的功能。此理解是否正确?

若上述理解正确,是否有其他外围电路,支持DC档。若不可以,我想换一个AD转换器,也达到200MSPS采样速率,在此速率下是否存在有支持DC档的AD转换器。若我要同时实现AC和DC采样的功能,如何实现?