The chip ADC reference

[Louis1916]

Customer feedback MPC5744 does the chip have diagnostics for the ADC reference? What is the diagnostic mechanism? What is the allowable error? Can you provide a corresponding architecture diagram?In the safety manual and FMEDA, it is only said that there is a safety mechanism, but there is no specific information,Thanks！

[petervlna · Accepted solution]

Hello,

ADC selftest is described in reference manual:

petervlna_0-1721731471937.png

You have supply self test 0,1, and 2

petervlna_1-1721731514840.png

Here is the described:

https://www.nxp.com/docs/en/application-note/AN5015.pdf

For better understanding you can use my old AN where the self test is similar:

https://www.google.com/url?sa=t&source=web&rct=j&opi=89978449&url=https://www.st.com/resource/en/app...

Best regards,

Peter