https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S6x-ADC-input-impedance-specs/m-p/1469892#M49070 <P>Hi,</P><P>I cant find the input impedance spec of the built-in ADC of&nbsp;LPC55S69JEV98K<BR />checked both datasheet and UM, please advice.<BR /><BR />Also looking for the tolerance/specification of the internal Voltage-reference rail.</P><P>&nbsp;</P><P>&nbsp;</P><P>Thanks!</P> Tue, 07 Jun 2022 09:25:01 GMT dav1 2022-06-07T09:25:01Z https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S6x-ADC-input-impedance-specs/m-p/1469892#M49070 <P>Hi,</P><P>I cant find the input impedance spec of the built-in ADC of&nbsp;LPC55S69JEV98K<BR />checked both datasheet and UM, please advice.<BR /><BR />Also looking for the tolerance/specification of the internal Voltage-reference rail.</P><P>&nbsp;</P><P>&nbsp;</P><P>Thanks!</P> Tue, 07 Jun 2022 09:25:01 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S6x-ADC-input-impedance-specs/m-p/1469892#M49070 dav1 2022-06-07T09:25:01Z https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S6x-ADC-input-impedance-specs/m-p/1469956#M49080 <P>Hi</P> <P>ADC input resistance is documented on DS. see below. Is that what you are looking for?</P> <P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="ZhangJennie_0-1654599529684.png" style="width: 400px;"><img src="https://community.nxp.com/t5/image/serverpage/image-id/182434iA27FD747D6C3AC15/image-size/medium?v=v2&amp;px=400" role="button" title="ZhangJennie_0-1654599529684.png" alt="ZhangJennie_0-1654599529684.png" /></span></P> <P>Thanks</P> <P>Jun Zhang</P> <P>&nbsp;</P> Tue, 07 Jun 2022 10:59:39 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC55S6x-ADC-input-impedance-specs/m-p/1469956#M49080 ZhangJennie 2022-06-07T10:59:39Z