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CDCLVC1112: 3.3V供电,输入不同功率的20MHz正弦波,输出增加分压电阻时输出电压不能达到3.3V,且分压得到的电压与计算的不符合

Part Number: CDCLVC1112

CDCLVC1112使用3.3V供电,分别输入5dbm和10dbm正弦波,输出通道Y0使用分压电阻想将3.3V时钟分压成1.8V时钟,使用100Ω和120Ω搭配,但示波器测量Y0通道输出只有1.92Vpp,分压后只有1.08Vpp,为什么输出的波形不是3.3V呢?