ADS1247: 使用ADS1247读取10KNTC温度传感器ADC，会有大概10秒的周期波动

读取10KNTC温度传感器，配置39K采样电阻常温下有周期性波动，使用外部参考电压源，50uA电流源，PGA为1，DR = 80 SPS，会有大概10秒的周期不定期波动，这种抖动应该可以排除是外部原因，想问问是不是配置问题造成的，还是电路原因造成的

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