各位大神好
最近在用MSP430FR6047IPZR做超声波水表，看着FR6047的手册只支持CH0和CH12路声道，若想增加到4通道需要配合模拟开关。TI有一份文档是“Ultrasonic Flow Transmitter Reference Design”在这个设计方案中CHx_IN端的运放THS3095的作用是什么？见下图：
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