S32KのトピックS32K116 ADC - Maximum possible sampling time https://community.nxp.com/t5/S32K/S32K116-ADC-Maximum-possible-sampling-time/m-p/965438#M5441 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>in order to reduce my BOM count in a current project, I would like to maximize the sampling time of the ADC. Thereby, I try to achieve that the output impedance of my temperature sensor is sufficient to drive the ADC sampling capacitor incl. analog bus capacitance.</P><P></P><P>What I already did:</P><P>1) Set ADC clock to SIRCDIV2_CLK (8 MHz)</P><P>2) Set ADC clock prescaler to 8</P><P>3) Set sample ticks to 255</P><P></P><P>This should result in a sample time of 256us.</P><P></P><P>Is there a way to further increase the sample time? E.g. using pretrigger and trigger?</P><P></P><P>Best regards,</P><P>Markus</P></BODY></HTML> Thu, 24 Oct 2019 12:52:02 GMT markus1 2019-10-24T12:52:02Z S32K116 ADC - Maximum possible sampling time https://community.nxp.com/t5/S32K/S32K116-ADC-Maximum-possible-sampling-time/m-p/965438#M5441 <HTML><HEAD></HEAD><BODY><P>Hello,</P><P></P><P>in order to reduce my BOM count in a current project, I would like to maximize the sampling time of the ADC. Thereby, I try to achieve that the output impedance of my temperature sensor is sufficient to drive the ADC sampling capacitor incl. analog bus capacitance.</P><P></P><P>What I already did:</P><P>1) Set ADC clock to SIRCDIV2_CLK (8 MHz)</P><P>2) Set ADC clock prescaler to 8</P><P>3) Set sample ticks to 255</P><P></P><P>This should result in a sample time of 256us.</P><P></P><P>Is there a way to further increase the sample time? E.g. using pretrigger and trigger?</P><P></P><P>Best regards,</P><P>Markus</P></BODY></HTML> Thu, 24 Oct 2019 12:52:02 GMT https://community.nxp.com/t5/S32K/S32K116-ADC-Maximum-possible-sampling-time/m-p/965438#M5441 markus1 2019-10-24T12:52:02Z Re: S32K116 ADC - Maximum possible sampling time https://community.nxp.com/t5/S32K/S32K116-ADC-Maximum-possible-sampling-time/m-p/965439#M5442 <HTML><HEAD></HEAD><BODY><P>Hello Markus,</P><P>You would need to prescale the ADC input clock,</P><P>in this case&nbsp;SIRCDIV2_CLK&nbsp;(SCG_SIRCDIV[SIRCDIV2]).</P><P></P><P>Regards,</P><P>Daniel</P></BODY></HTML> Tue, 29 Oct 2019 09:17:03 GMT https://community.nxp.com/t5/S32K/S32K116-ADC-Maximum-possible-sampling-time/m-p/965439#M5442 danielmartynek 2019-10-29T09:17:03Z