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FR8016H上自带的16位audio codec能否实现高精度的单端信号采集啊?
可以实现的,之前做过一个类似的医疗产品方案(无线体温贴),将热敏电阻采集到的小信号放大后,给到FR8016芯片的麦克风输入端(MIC_IN),实现高精度采样。
这个运放的放大原理是怎样?看起来是一个增益是0dB的缓冲器,起到阻抗变换的作用吧?
可以不用运放吗?adc的内阻多大?
如何配置和读取呢?