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LMK04828: LCPECL的电平标准是什么

Part Number: LMK04828


在datasheet上看到LMK04828支持LCPECL,请问什么是LCPECL,LCPECL和LVPECL的区别是什么呢?

  • 您好,我找了下没有相关文档来介绍LCPECL电平, 通过下面这个图可以看出,LCPECL是通过射极电阻组成的分压网络来设置DC耦合信号的共模电压。 

    另外,关于LVPECL和LCPECL几种不同电平标准,emitter 电阻阻值大小的取值和输出幅值的关系,建议参考下下表:

    Load is AC coupled 100 ohms differential.

    Frequeny Format Emitter Resistor Amplitude Diff (Vpp) Icc (mA) Informational Only
    122.88 LVPECL16 68 ohm 1.55 Yes
    122.88 LVPECL20 68 ohm 1.92 Yes
    122.88 LCPECL 68 ohm 1.8 Yes
    122.88 LVPECL16 120 ohm 1.54 35.5 No
    122.88 LVPECL20 120 ohm 1.85 36.2 No
    122.88 LCPECL 120 ohm 1.45 27.3 No
    122.88 LVPECL16 200 ohm 24.9 No
    122.88 LVPECL20 200 ohm 25.7 No
    122.88 LCPECL 200 ohm 20.0 No
    122.88 LVPECL16 240 ohm 1.25 22.1 No
    122.88 LVPECL20 240 ohm 1.24 22.9 No
    122.88 LCPECL 240 ohm 0.968 18.0 No
    122.88 LVPECL16 330 ohm 1.04
    122.88 LVPECL20 330 ohm 1.04
    122.88 LCPECL 330 ohm 0.761