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如题，使用的是INA821，在G=1时，其带宽应该为4MHZ，但是在测量时输入1V正弦信号，在大概1MHZ处，信号就衰减至了0.7，是我的测试方法有问题还是芯片标称参数的问题？试了几个都是相同的情况！求解答！
