在使用AFE5805过程中,我们分别使用了不同频率的采样时钟,记过发现采样频率高于35M后,FCLK信号的占空比发生了畸变,这种畸变是时有时无的,不知道是什么原因引起的?如何解决?
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最好抓个波形出来看看. LCLK是否有问题?
可能有几个原因:
1. PCB布线引起的. 阻抗连续性问题.
2. AFE5805的供电是否干净,可能影响内部PLL.建议全部采用LDO供电
3. 输入的时钟是什么样的?
4.最后,可以按手册里面P21要求,在初始化AFE5805后,再配置相关的寄存器.
Dear Mr Chen,
i have seen your TI Solution for Medical Ultrasound and want to discuss further with you. Can you tell me how to contact you ?
Best regards