Unfortunately your suggestion did not work. Here are some captured results. Starts with reading on ground, then roughly 2.5V then VDD (5V);

ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 0
ADVAL_1 = 30912
ADVAL_1 = 31168
ADVAL_1 = 31104
ADVAL_1 = 31168
ADVAL_1 = 31040
ADVAL_1 = 31104
ADVAL_1 = 31040
ADVAL_1 = 31104
ADVAL_1 = 31168
ADVAL_1 = 31232
ADVAL_1 = 31040
ADVAL_1 = 31104
ADVAL_1 = 31104
ADVAL_1 = 31104
ADVAL_1 = 31040
ADVAL_1 = 31104
ADVAL_1 = 31104
ADVAL_1 = 31232
ADVAL_1 = 31104
ADVAL_1 = 31168
ADVAL_1 = 65216
ADVAL_1 = 65280
ADVAL_1 = 65280
ADVAL_1 = 65280
ADVAL_1 = 65216
ADVAL_1 = 65216
ADVAL_1 = 65344
ADVAL_1 = 65344
ADVAL_1 = 65280
ADVAL_1 = 65344
ADVAL_1 = 65344
ADVAL_1 = 65280
ADVAL_1 = 65344