Can I power the an Atmega328 with a 5v ac adapter directly ?

Can I power the Atmega328 with a 5v ac adapter directly WITHOUT any voltage regulators ?
I am going to use this adapter
http://www.ebay.com/itm/EU-DC-5V-1A-Switching-Power-Supply-adapter-100-240V-AC-/270595823353?pt=US_Server_Power_Supplies&hash=item3f00c496f9

Yes and no.

Do you have a standalone ATmega328 ? or an Arduino board with a ATmega328 ?
For an Arduino board, use the DC-connector and a power supply of about 7...12V.
Do you have a multimeter ? Check the voltage of the 5V DC adapter without load. If it is above 5.5V, you can not use it for a standalone ATmega328.

Erdin:
Yes and no.

Do you have a standalone ATmega328 ? or an Arduino board with a ATmega328 ?
For an Arduino board, use the DC-connector and a power supply of about 7...12V.
Do you have a multimeter ? Check the voltage of the 5V DC adapter without load. If it is above 5.5V, you can not use it for a standalone ATmega328.

I have a stand alone Atmega328 , What it is the range of the supplying voltage for it ?
Thanks,

1.8-5.5V DC
PS: when you are going to work with standalone 328p its datasheet download would be advisable..

pito:
1.8-5.5V DC
PS: when you are going to work with standalone 328p its datasheet download would be advisable..

Thanks a lot.