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ADS131M08: 关于模拟信号采集板PCB敷铜的问题

Part Number: ADS131M08


你好,

    请问为什么有的ADC采集板PCB设计中TOP层和BOTTOM层要填充GND网络铜皮,而有的就不用填充。
    请问有没有关于此方面的设计案例和参考资料

谢谢!