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选用OPA657建立一个大带宽的积分器

Other Parts Discussed in Thread: OPA657

想用运算放大器搭一个大带宽的积分器,选用OPA657作为运放单元。设计电路

再TINA中仿真结果为

从bode图中可以看出在100Hz时,是有积分效果的,但实际实验是:100k到1M有积分效果,在1kHz已经没有积分效果了,输入一个矩形波,输出仍然是矩形波,没有出现限幅现象

请问是哪里除了问题,有没有推荐方案