我使用了一片ADS1198做肌电信号采集,初始化成功后用信号发生器产生的正弦波做测试,依次接到1-8通道上,其他通道悬空。在PGA = 1时,除了2通道,其他通道转换后的值都准确,在PGA 等于其他值时,所有通道的数据都不准确,除了2通道,其他通道数据都一致,请问这是因为芯片出了问题吗?
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