TI中文支持网Part Number:ADS1299
我现在使用ADS1299设计了8通道脑电采集电路板。在测试电路性能的时候，我使用信号发生器输出10Hz、2mV的标准正弦波形，信号发生器的正极依次连接1-8通道，信号发生器的负极与电路参考SRB2相连，以测试每个通道的性能。结果通道1到通道7都输出了标准正弦波形，但是通道8中噪声干扰较大、波形畸变。
为了避免通道串扰、电磁干扰，我把通道8前端的电阻电容全都挖掉了，通道8前端没有任何元件连接。信号发生器的输出直接接到芯片ADS1299的通道8引脚，结果还是一样噪声干扰很大。检查了一下寄存器配置，各通道寄存器配置是一样的。
请问通道8信号不准确是什么原因，应该怎么处理？
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Links：
请用户查看器件数据表《EVM 用户指南》和下面的链接
https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/772058/faq-common-questions-for-ti-s-ads129x-family-of-bio-potential-adcs
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