Kinetis MicrocontrollersのトピックADC value when input is less than 0V https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-value-when-input-is-less-than-0V/m-p/424693#M24433 <HTML><HEAD></HEAD><BODY><P>In my design I have an ADC single ended input that may experience a voltage as low as -0.1V with respect to the analog Vss. I need to know what the conversion result will be in this case.</P><P>Is it 0?</P><P>Is it undefined?</P></BODY></HTML> Wed, 03 Jun 2015 14:49:11 GMT williamely 2015-06-03T14:49:11Z ADC value when input is less than 0V https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-value-when-input-is-less-than-0V/m-p/424693#M24433 <HTML><HEAD></HEAD><BODY><P>In my design I have an ADC single ended input that may experience a voltage as low as -0.1V with respect to the analog Vss. I need to know what the conversion result will be in this case.</P><P>Is it 0?</P><P>Is it undefined?</P></BODY></HTML> Wed, 03 Jun 2015 14:49:11 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-value-when-input-is-less-than-0V/m-p/424693#M24433 williamely 2015-06-03T14:49:11Z Re: ADC value when input is less than 0V https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-value-when-input-is-less-than-0V/m-p/424694#M24434 <HTML><HEAD></HEAD><BODY><P>Hi William Ely,</P><P>It will read 0 when -0.1V connect the input pin if VSS is 0V, however I'd highly recommend that the range of the analog input voltage should within Vrefl~Vrefh.</P><P>Hope it helps.<BR />Have a great day,<BR />Ping</P><P></P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 04 Jun 2015 03:33:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/ADC-value-when-input-is-less-than-0V/m-p/424694#M24434 jeremyzhou 2015-06-04T03:33:20Z