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在RM48L530的datasheet中关于内部ADC的介绍未发现输入阻抗是多少，请给出一个确定值，以设计外围电路。
Hi Easter,
我们有一篇应用手册，《ADC 源阻抗用于Hercules™ ARM® 安全MCU (Rev. B) 》，请参考。
链接如下：
http://www.ti.com/cn/litv/pdf/zhca454b
Regards,
Jay
