使用过程中发现TX发送信号时RX电平受TX电平影响,有放电波形
,请帮忙解释下原因
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3088是半双工器件,可以看到driver的输出端AB即为接收端的输入端,而R的输出是和AB的电压有关系的,AB的输出又是发送端D决定的,所以您这边看到输出端RX的电平和driver的发送端D有关联的。
可以参考这篇“隔离495收发器的参考设计”应用手册:https://www.ti.com.cn/cn/lit/an/zhcabs7a/zhcabs7a.pdf