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您好：
我购买了一块ADS1299EEGFE-PDK，可否提供一下ADS1299EEGFE-PDK的原理图工程文件，用于EEG脑电测量，ADS1299的通道和参考电极怎么连接？
您好，
我们只能提供其gerber文件，如下E2E帖子链接中下载：
https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/889859/ads1299eegfe-pdk-pcb-layout-files-request
下面链接是 ADS1299EEGFE-PDK 用户指南，里面介绍了EVM板的操作和使用，其中第7部分是EEG特性说明：
https://www.ti.com.cn/cn/lit/ug/slau443b/slau443b.pdf
下面链接是TI生物信号ADC产品常见问题解答，希望对您有所帮助：
[FAQ] Common Questions for TI's ADS129x Family of Bio-Potential ADCs
