ATMEGA3208 datasheet(15/68 Pages) MICROCHIP

15 / 68 page

Symbol Description

Condition

Min. Typ.

Max. Unit

Factory calibration accuracy

TA=25°C, 3.0V

TBD ±0.75 TBD %

ETOTAL

Total error with 16 MHz

frequency selection

From target

frequency

TA=[0, 70]°C,

VDD=[1.8, 3.6]V

TBD ±2

TBD %

Full operation

range

TBD ±3

TBD

Total error with 20 MHz

frequency selection

From target

frequency

TA=[0, 70]°C,

VDD=[1.8, 3.6]V

TBD ±2

TBD

Full operation

range

TBD ±3

TBD

EDRIFT

Accuracy with 16 MHz

Frequency Selection relative

to the factory-stored

frequency value

Factory calibrated

VDD=3V(1)

TA=[0, 70]°C,

VDD=[1.8, 5.5]V

TBD ±1.5

TBD %

Accuracy with 20 MHz

Frequency Selection relative

to the factory-stored

frequency value

Factory calibrated

VDD=3V(1)

TA=[0, 70]°C,

VDD=[1.8, 5.5]V

TBD ±1.5

TBD

ΔfOSC20M Calibration step size

0.75

DOSC20M Duty cycle

tstartup

Start-up time

Within 2%

accuracy

µs

Note:

See also the description of OSC20M on calibration.

Oscillator Frequencies above speed specification must be divided so that CPU clock always is

within specification.

Table 5-13. 32.768 kHz Internal Oscillator (OSCULP32K) Characteristics

Symbol

Description

Condition

Min. Typ.

Max. Unit

fOSCULP32K Factory calibration

frequency

32.768

kHz

Factory calibration

accuracy

TA=25°C, 3.0V

-3

±2

ETOTAL

Total error from target

frequency

Factory

calibrated

TA=[0, 70]°C,

VDD=[1.8, 3.6]V

-10

±5

+10

Full operation

range

-30

±10

+30

DOSCULP32K Duty cycle

tstartup

Start-up time

250

µs

ATmega3208/4808 – 32-pin Data Sheet

Electrical Characteristics

Datasheet Preliminary

DS40002017A-page 15

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