图中R3、R4以及R5、R6的作用是什么呢,在我看来是将IN1P/N的电压拉升到(AVDD+AVSS)/2,那么这么做是为什么呢?请指教。
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您好,输入端IN1和IN2是和内部PGA连接,所以这里加了(AVDD+AVSS)/2作为偏置电压,将电压升高目的应该是为了满足内部PGA的线性输入范围。