If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.
You should not get more than 2047 as the result will always be in 2's complement where the MSb will be used to determine the sign (-/+). For single ended 12-bit you should expect results between 0 and 2047 (b0-b0000 0111 1111 1111).
如图所示，内部参考电压为1.24V.