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ADS5474在低温条件下性能下降原因

Other Parts Discussed in Thread: ADS5474

我们做的采集卡使用的TI高速采集芯片ADS5474,参考 的TI官网原理图。

常温下性能:SINAD : 62.249   SNR :62.824   THD :-71.321   SFND :70.917  ENOB :10.0

-40度时性能:SINAD : 58.637   SNR :58.895   THD :-71.037   SFND :63.579  ENOB :9.4

ADS5474的AVCC采用的TI的PTH05060供电,通过检测电源纹波在常温下和-40度条件下无

明显变化,请教下这可能是哪些原因造成的?谢谢