topic Re: common mode range in Kinetis Microcontrollers https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735861#M44930 <HTML><HEAD></HEAD><BODY><P>This is still a bit ambiguous as there is also a pin on the package labeled VREFH which I have tied to 3v3 but I am using internal 1.2v reference so is max VADIN 31/32 of 1.2v (selected VREF) or 31/32 of 3.3V (package pin).</P></BODY></HTML> Wed, 06 Jun 2018 03:40:00 GMT jakebailey 2018-06-06T03:40:00Z common mode range https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735859#M44928 <HTML><HEAD></HEAD><BODY><P>What is the common mode input range of K22 differential ADC? I assumed it would be reasonably close to the supply rails but this does not appear to be the case as inputting common mode signals above&nbsp;1.2 vref starts to cause distortion.</P></BODY></HTML> Wed, 30 May 2018 17:01:20 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735859#M44928 jakebailey 2018-05-30T17:01:20Z Re: common mode range https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735860#M44929 <HTML><HEAD></HEAD><BODY><P>You can find the VADIN in DataSheet.</P><P><span class="lia-inline-image-display-wrapper" image-alt="VADIN.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/17464i9D0D770D265ECCAE/image-size/large?v=v2&amp;px=999" role="button" title="VADIN.png" alt="VADIN.png" /></span></P><P>Best Regards,</P><P>Robin</P><P style="min- padding: 0px;">&nbsp;</P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Wed, 06 Jun 2018 01:47:47 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735860#M44929 Robin_Shen 2018-06-06T01:47:47Z Re: common mode range https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735861#M44930 <HTML><HEAD></HEAD><BODY><P>This is still a bit ambiguous as there is also a pin on the package labeled VREFH which I have tied to 3v3 but I am using internal 1.2v reference so is max VADIN 31/32 of 1.2v (selected VREF) or 31/32 of 3.3V (package pin).</P></BODY></HTML> Wed, 06 Jun 2018 03:40:00 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735861#M44930 jakebailey 2018-06-06T03:40:00Z Re: common mode range https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735862#M44931 <HTML><HEAD></HEAD><BODY><P><span class="lia-inline-image-display-wrapper" image-alt="ADC Reference Options.png"><img src="https://community.nxp.com/t5/image/serverpage/image-id/31750i0FDFB7269CDC69F7/image-size/large?v=v2&amp;px=999" role="button" title="ADC Reference Options.png" alt="ADC Reference Options.png" /></span></P><P>ADCx_SC2[REFSEL] bit selects the voltage reference sources for ADC.<BR />When 1.2 V VREF_OUT is selected, the The max VADIN is 31/32 of 1.2v. </P><P></P><P>Best Regards,</P><P>Robin</P><P style="min- padding: 0px;">&nbsp;</P><P>-----------------------------------------------------------------------------------------------------------------------<BR />Note: If this post answers your question, please click the Correct Answer button. Thank you!<BR />-----------------------------------------------------------------------------------------------------------------------</P></BODY></HTML> Thu, 07 Jun 2018 08:04:32 GMT https://community.nxp.com/t5/Kinetis-Microcontrollers/common-mode-range/m-p/735862#M44931 Robin_Shen 2018-06-07T08:04:32Z