topic Re: ADC wrong reading MPC5748G in MPC5xxx https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714399#M9441 <HTML><HEAD></HEAD><BODY><P>Hi, do you have chosen reference voltage you expect (3.3V/5V) ?</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/28486i242E572BE0089975/image-size/large?v=v2&amp;px=999" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P></BODY></HTML> Thu, 07 Sep 2017 10:42:47 GMT davidtosenovjan 2017-09-07T10:42:47Z ADC wrong reading MPC5748G https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714398#M9440 <HTML><HEAD></HEAD><BODY><P>I get wrong reading of voltage from the ADC, for exemple the voltage on the adc pin is 0.720v and the the adc is getting 1.020v</P></BODY></HTML> Sun, 03 Sep 2017 13:08:34 GMT https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714398#M9440 medhedibasly 2017-09-03T13:08:34Z Re: ADC wrong reading MPC5748G https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714399#M9441 <HTML><HEAD></HEAD><BODY><P>Hi, do you have chosen reference voltage you expect (3.3V/5V) ?</P><P></P><P><span class="lia-inline-image-display-wrapper"><img src="https://community.nxp.com/t5/image/serverpage/image-id/28486i242E572BE0089975/image-size/large?v=v2&amp;px=999" title="pastedImage_1.png" alt="pastedImage_1.png" /></span></P></BODY></HTML> Thu, 07 Sep 2017 10:42:47 GMT https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714399#M9441 davidtosenovjan 2017-09-07T10:42:47Z Re: ADC wrong reading MPC5748G https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714400#M9442 <HTML><HEAD></HEAD><BODY><P>Thank you for your reply, the issue was related to a hardware implementation on my board, the voltage divider was influenced by the some command signal related to&nbsp; a transistor that changed the voltage divider gain value used on software.<BR />i corrected the schematic and the problem disappeared.&nbsp; &nbsp;</P></BODY></HTML> Mon, 02 Oct 2017 10:40:42 GMT https://community.nxp.com/t5/MPC5xxx/ADC-wrong-reading-MPC5748G/m-p/714400#M9442 medhedibasly 2017-10-02T10:40:42Z