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OPA858: 输入阻抗是多少?

Part Number: OPA858

从PD(光电探测器)到OPA858之间有较长一段走线,现需要仿真走线的射频性能。如果在OPA858前加一段50欧的微带线,性能影响大吗?能不能帮忙仿真看看结果怎样?谢谢!