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THS4001使用问题

Other Parts Discussed in Thread: THS4001

为了放大DDS出来的信号(f=1MHz,Vpp=1V),前段时间买了THS4001这个芯片。可是按照手册中简单地搭了一个闭环增益为6的同相比例放大器,却发现输出的波形Vpp连1V都不到。请教这款运放在设计电路上有什么特别需要注意的地方吗?为什么评估板上的电路增益都是1或是-1呀?