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TIDA-010249: 参考设计中进ADC时,为什么通过THS4551将信号放到到2倍?

Part Number: TIDA-010249

图片红色圆圈里,左边信号是±2V,放大后是±4V,考虑2.5V偏置,输入信号对地电压范围是-1.5V~6.5V,已经超过ADC输入电压范围。

请帮忙确认。