最近用OPA2171AIDR（带宽3MHz）设计了一个2倍放大电路，放大器采用±5V双电源供电。输入信号是±1.2V的正弦交流信号。当输入信号频率为100kHz时，输出信号幅值正确，当输入信号频率大于150kHz时，输出信号幅值衰减，达不到2倍放大，且变为三角波形，请问这是OPA2171AIDR器件批次问题还是电路设计问题？
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