Other Parts Discussed in Thread: OPA1662, OPA1622, OPA1612
图一是opa1662的datasheet里的一张IV+LPF电路图,DAC输出L+经过opa1622的IV放大后再送入LPF部分做低通滤波,但是这张图上L+输入的是in-,也就是反向输入了,与之类似的还有opa1612的datasheet,LPF部分也是反向输入。而图2是早期EVM上的电路,L-输出到LPF的in-,标准的同相输入。请问两种有何不同,那种才是更适合1794呢?
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