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TIDA-010231: TIDA-010231运放设计考虑

Part Number: TIDA-010231

关于参考设计TI-TIDA010231原理图,有以下几个问题想请教一下

1D1R3的作用推测是保护后级运放,但具体的作用能否详细解释一下,为什么选择此电路?

2、差分输入信号处理目前是用一级运放进行信号放大,相比于此方案,先用差分运放再用电压跟随器会不会使共模抑制的效果好一些?

3C1C2滤波电容位置在差分输入之间与负极与地,正极与地为什么没有此电容?电容这样分配的优点在于?

Thanks!