I guess the OP needs to verify if the 4.096 was used (LM4040-4.1 was in the original post) or a 5V device.
@ma_wu
Please verify the reference voltage on your sketch is 4.04 not 4.84 
If it is 4.84 and the LM4040 is a 4.1 then there is an issue that needs to be remedied.