ATmega324P datasheet(336/377 Pages) ATMEL

336 / 377 page

336

7674F–AVR–09/09

ATmega164P/324P/644P

26.7

ADC Characteristics

Notes:

1. On ATmega644P, offset gain and TUE will be higher if not using idle mode.

Table 26-8.

ADC Characteristics, Single Ended Channel

Symbol

Parameter

Condition

Min(1)

Typ(1)

Max(1)

Units

Resolution

Single Ended Conversion

Bits

TUE

Absolute accuracy (Including

INL, DNL, quantization error,

gain and offset error)

Single Ended

Conversion(1)

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

2.5

LSB

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

Noise Reduction Mode

2.5

INL

Integral Non-Linearity

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.5

1.5

DNL

Differential Non-Linearity

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.3

0.7

Gain Error

Single Ended

Conversion(1)

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

-4

-2

Offset Error

Single Ended

Conversion(1)

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

-4

Conversion Time

Free Running Conversion

260

µs

Clock Frequency

Single Ended Conversion

200

kHz

AVCC

Analog Supply Voltage

VCC - 0.3

VCC + 0.3

VREF

Reference Voltage

1.0

AVCC

Input Voltage

GND

REF

VINT1

Internal Voltage Reference

1.1V

1.0

1.1

1.2

VINT2

Internal Voltage Reference

2.56V

2.33

2.56

2.79

RREF

Reference Input Resistance

RAIN

Analog Input Resistance

100

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