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DS15MB200 是否集成输入直流偏置

Other Parts Discussed in Thread: DS15MB200

    对于DS15MB200,我有如下疑问;

    1、器件的接收端,是否已经集成直流偏置?接收端外接交流耦合电容,该器件是否不需要增加其他外围电路?

    2、发送端已集成100Ω电阻,差分线我再增加交流耦合电容,若接收器(我们自己的器件)已有直流偏置,是否也不需要其他额外的器件?

谢谢!

  • 输入端集成了100ohm终端匹配电阻,而上下拉配置偏置的电路是需要外部做的,datasheet中也有提到:
    External pull up and pull down resistors may be used to provide enough of an offset to enable an input failsafe
    under open-circuit conditions. This configuration ties the positive LVDS input pin to VDD thru a pull up resistor
    and the negative LVDS input pin is tied to GND by a pull down resistor. The pull up and pull down resistors
    should be in the 5kΩ to 15kΩ range to minimize loading and waveform distortion to the driver. The commonmode
    bias point ideally should be set to approximately 1.2V (less than 1.75V) to be compatible with the internal
    circuitry.