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LMH6882增益输出异常

Other Parts Discussed in Thread: LMH6882, LMH6552, ADC08D1500

1、如下是LMH6882的原理图

2、如下是整个系统拓扑LM6882前级是LMH6552输出,后级是ADC

目前 调试过程中,读取LMH6882的寄存器其默认增益6DB,即放大1.99倍,但实际测试中LMH6882的差分输出与差分输入的比值为1.9

调整其他增益大小,实际增益与设定增益也是有差值,不知道怎么回事,

使用TINA仿真原理图也是正常的,不知道问题出现在哪儿了