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TL431: TL431手册中小信号电压增益图咨询

Part Number: TL431

在TL431的手册中,有出一张小信号电压增益随频率变化的曲线,1. 这个波形怎么理解呢?是在REF端产生一个小信号扰动,Output输出对应输出电压的变化?2. 这个跟输出电压的目标值设置有关系吗?跟分压电阻大小设置有关系吗?3.IKA的电流值不同,增益会变化吗?