AD9762是12位的，我们使用时，其前级接FPGA，FPGA晶振50M，AD9762 的CLK也是50M。
AD9762输出通过运放将电流信号转成电压信号，放大倍数为510倍。用示波器测试输出发现输出电压波形有震荡，震荡幅度1V左右，频率250KHZ左右。
不通过运放放大，仅仅接电阻转换成电压信号有同样震荡。不知道该怎么解决。附件里是测试波形及原理图。
谢谢帮忙！
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