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噪音仿真运放供电疑问

Other Parts Discussed in Thread: OPA333

附件PDF仿真图第一页有下载链接,我下载了。其中ECG Front End Noise这个图的U2供电是负电源,这正确吗?OPA333是单电源运放

但是仿真出来的效果和PDF P21是一样的。

7762.zhcu075.pdf

ECG Front End Noise.TSC

  • 您好,这里确实是有问题的,正负电压接反了,1.8~5.5V单电源供电,或者+-0.9V~+-2.75V,所以即使正压接0V,负压接-3.3V也是超过了-2.75V的要求。

    这里应该是单电源3.3V供电,但是VDD和GND接反了。