ATMEGA4808 datasheet(21/68 Pages) MICROCHIP

21 / 68 page

Symbol Description

Conditions

Min.

Typ.

Max.

Unit

REFSEL =

INTERNAL

1.1V≤VREF

fADC=115 ksps

0.5

REFSEL = VDD

1.8V≤VREF

fADC=115 ksps

0.9

EABS

Absolute

accuracy

REFSEL =

INTERNAL

VREF = 1.1V

T=[0-105]°C

VDD = [1.8V-3.6V]

<10

LSB

VDD = [1.8V-3.6V]

<15

REFSEL = VDD

REFSEL =

INTERNAL

<35

EGAIN

Gain error

REFSEL =

INTERNAL

VREF = 1.1V

T=[0-105]°C

VDD = [1.8V-3.6V]

±15

LSB

VDD = [1.8V-3.6V]

±20

REFSEL = VDD

REFSEL =

INTERNAL

±35

EOFF

Offset error

REFSEL =

INTERNAL

VREF = 0.55V

-0.5

LSB

REFSEL =

INTERNAL

1.1V ≤ VREF

-0.5

LSB

Note:

A DNL error of less than or equal to 1 LSB ensures a monotonic transfer function with no missing

codes.

These values are based on characterization and not covered by production test limits.

Reference setting and fADC must fulfill the specification in "Clock and Timing Characteristics" and

"Power supply, Reference, and Input Range" tables.

5.11.2

External Reference Characteristics

Operating conditions:

•

VDD = 1.8 to 5.5V

•

Temperature = -40°C to 125°C

•

DUTYCYC = 25%

•

CLKADC = 13 * fADC

•

SAMPCAP is 5 pF

ATmega3208/4808 – 32-pin Data Sheet

Electrical Characteristics

Datasheet Preliminary

DS40002017A-page 21

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