If an external capacitor is used on the analog reference pin (AREF), it should be equal to or larger than

100nF. Smaller capacitor value can make the AREF buffer unstable with large ringing which will reduce

the accuracy of the ADC.

Problem Fix/Workaround

None.

13.2.3.

Rev. C

No known errata.

13.2.4.

Rev. D to J

Not sampled.

13.2.5.

Rev. K

No known errata.

13.3.

Errata ATmega168PB

The revision letter in this section refers to the revision of the ATmega168PB device.

13.3.1.

Rev. A

– Wrong device ID when using debugWire

– Power consumption in power save modes

– USART start-up functionality not working

– External capacitor on AREF pin

1.) Wrong device ID when using debugWire

The device ID returned using debugWire is incorrect.

Problem Fix/Workaround

None.

2.) Power consumption in power save modes

Power consumption in power save modes will be higher due to improper control of internal power

management.

Problem Fix/Workaround

None

3.) USART start-up functionality not working

While in power save modes, the USART start bit detection logic fails to wakeup the device.

Problem Fix/Workaround

None.

4.) External capacitor on AREF pin

If an external capacitor is used on the analog reference pin (AREF), it should be equal to or larger than

100nF. Smaller capacitor value can make the AREF buffer unstable with large ringing which will reduce

the accuracy of the ADC.

Problem Fix/Workaround

Atmel ATmega48PB/88PB/168PB [DATASHEET]

Atmel-42176G-ATmega48PB/88PB/168PB_Datasheet_Summary-03/2016

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