hi ，请问下，数据手册中有如下描述，这个意思是不是我外面接的对地电阻或者是等效电阻不能大于5K欧姆？
Hi haifeng.jin,
There is application note which gives a thorough description of internal/external impedance matching:
AN4373 Cookbook for SAR ADC Measurements ADC measurements done properly
https://www.nxp.com/docs/en/application-note/AN4373.pdf
AN12217 S32K1xx ADC guidelines, spec and configuration
Analog-signal source resistance
https://www.nxp.com/docs/en/application-note/AN12217.pdf
Regards,
Daniel
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