你好，使用AD8367工作在VGA模式，电路图是按照datasheet典型应用电路连接的，如 下图
然后调试结果是，当VGIAN=500mV时，输出才放大2倍。最大能放大5倍左右，请问这是怎么回事，正常吗？
即使如此，输入信号100mV，当频率增加到40MHz时，开始衰减，这种现象也不正常吧，毕竟ad8367是增益带宽积100G的?
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