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关于集成超声波传感器模拟前端的MSP430FR6047IPZR的4声道的超声波电路问题探讨

Other Parts Discussed in Thread: THS3095

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:

 tidudo7.pdf