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我想做一个蓝牙4.0可穿戴设备，芯片选的是CC2541，需要读取的是电阻值。
看到cc2541的芯片，有8个ADC接口，想问一下能直接在8个ADC上接电阻，还是需要另外的ADC取样电路？
如果需要，请建议适合可穿戴设备的芯片型号
不需要另外的取样电路
你可以将要读取的电阻作为取样电阻啊。
用555电路测量频率
