下面图讲的是DA3482的LVDS输入,这里是在芯片内接了100欧做匹配?那芯片外部信号可以直接接进来吗,还是需要额外的配置电路?
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内部是有100欧姆端接的
不需要外部端接了。
不然,要放16个100欧姆的电阻,太难布线了
100ohm匹配电阻一般都端接在靠近receiver端,所以使用LVDS接收器或者这类集成LVDS receiver的时候,首先先查看是否内部已经端接,已经端接的就不需要外部再加,没有的话需要外部端接100ohm 匹配电阻。