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ADS1241晶振不起振

Other Parts Discussed in Thread: ADS1241

原理图如下,晶振未能起振,示波器观察Xin脚无波形,SPI通信一直未成功。和其共用SPI接口的AD7705工作正常,晶振正常起振。二者互换晶振和电容,AD7705的依然正常,ADS1241的依然异常,不知是何原因?!

  • ADS1241各个供电电压都正常吧?先检查下供电电压。

    另外,您的晶振是多大频率的,晶振的负载电容多少,从而判断电路中C46,C47的大小。datasheet倒是推荐了几款晶振型号,如果方便的话可以试下。