We have a custom board based on the LPC54005 MCU.
The board runs with FreeRTOS at 180M by calling BOARD_BootClockPLL180M().
We set the ADC to use the Synchronous mode with a CLKDIV of 3 to arrive at 60MHZ ADC clock.
We also set the TSAMP to 3 and RESOL to 12Bit.
We added to symbols:
When we measure zero voltage at an ADC input we get a reading of 55 to 64 ADC units.
It seems that all ADC behave in the same manner with an offset from zero.
We use a VRef at +2.494VDC.
Is this normal and if not what am I doing wrong?