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LM98620应用问题，急急急！！！

Guangfei Zhang
Prodigy 10 points

Other Parts Discussed in Thread: LM98620

你好，

        我想问下LM98620 的offset寄存器值什么情况下起作用？我是通过FPGA设置的，6个C_OFFS_XX寄存器和6个F_OFFS_XX都设置了，但是波形没有整体抬升或者下降。

      另外，我在0x23寄存器的bit2=1的时，波形有整体抬升(抬升高度和0x20-0x22寄存器值有关)，但最大值到了不ADC的最大值了，而且者时候波形稍微有点晃动，相比0x23寄存器的bit2=0的时，不知道这些如何避免或者解决？在线等待，盼回复。

  • 0
    Guru 63421 points

    怎么起作用， 首页这里应该回答你的问题

    Each channel also has a ±4 bit coarse and ±10-bit fine analog offset correction DAC that allows offset correction before the sample-and-hold amplifier. These correction values can be controlled by an automated Digital Black Level correction loop. The PGA and offset DACs for each channel are programmed independently allowing unique values of gain and offset for each of the six channels.