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ads1299 schematic and RLD

Other Parts Discussed in Thread: ADS1299, ADS1299EEGFE-PDK

请教各位ADS1299的供电和RLD设计,双电源供电,内部晶振,如下图所示,不知道这样设计有没有问题?

测试发现VCAP1=-1.3V, VCAP2=0V, VCAP3=4.5V, VCAP4=-2.5V, VREFP=-2.4V, VREFN=-2.5V, DRDY跳变频率在250Hz左右。

发送了WREG CONFIG3 E0h这个指令(internal reference),但是VREFP不对,不知道哪里出了问题??求指教!

有类似问题或者其他经验,欢迎一起讨论~email:drystan@zju.edu.cn

谢谢!