hi
I use THS4561 to convert the input single ended signal into a differential signal and input it into ADS8900.
In actual testing, when I input a signal of 0V, the positive end of the operational amplifier outputs(OUTP) 4.14V and the negative end outputs((OUTM) ) 0.026V. After changing the input voltage, the positive output of the operational amplifier remained at 4.14v and the negative output remained at 0.026v.
When I disconnected the ADC, I measured that the positive output of the operational amplifier(OUTP) was 4.9v and the negative output(OUTM ) was 0.026v.
The circuit parameters are as follows
VSP=5V
VSM=0V
VCOM=2V
PD=5v
您好，我在更改了反馈端接法后运放工作正常了。但是在测试ADS8900B时发现经过运放输出的正端电压和负端电压噪声很大。当我把ADS8900B吹掉之后量运放正负端输出就没有那么大噪声了。请问这是什么问题呢？
第一个图是有ADS8900B时对应的运放端的输出，第二个图是吹掉ADS8900B时对应的运放端输出。
黄色是运放正端输出，红色是负端输出，绿色为信号发生器输入到运放的信号
