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请问一下PGA281 VSON引脚能否接负2.5V，然后DVDD引脚接3V，这样电路能否正常工作？
VSON可以接负压，VSON的电压范围为 VSN~[（VSP）-5V]
DVDD-VSON的电压范围： VSN<DVDD-VSON<[(VSP)-1]V
所以你的这种情况，要看VSP和VSN电压，如果在这个范围内就没问题。
