AVEE接负压没问题,但是DAC输出电压是不低于AVEE的 ,所以如果需要输出-5V~0V的话,AVEE要低于-5V。
The output voltage of each DAC group must not be greater than that of the corresponding AVCC pin (AVCC_AB or AVCC_CD) or lower than
that of the corresponding AVSS pin (AVEE, AVSSB, AVSSC or AVSSD).