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看手册说可以应用体育和建身（心率，呼吸和ECG），我想问一下这款芯片如何测呼吸
事实上，这里呼吸指的是ADS1192R这款，因为这款内部集成了Respiration modulation 电路，可参考Figure 14的内部架构图：
如何测的话，可参考这篇应用手册：
http://www.ti.com/lit/an/sbaa181/sbaa181.pdf
