ATmega1284P datasheet(331/380 Pages) ATMEL

331 / 380 page

331

8059D–AVR–11/09

ATmega1284P

26.8

ADC Characteristics

Notes:

1. Values are guidelines only.

Table 26-8.

ADC Characteristics, Single Ended Channel

Symbol

Parameter

Condition

Min(1)

Typ(1)

Max(1)

Units

Resolution

Single Ended Conversion

Bits

Absolute accuracy (Including

INL, DNL, quantization error,

gain and offset error)

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

LSB

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 1 MHz

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

Noise Reduction Mode

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 1 MHz

Noise Reduction Mode

Integral Non-Linearity (INL)

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

1.2

Differential Non-Linearity (DNL)

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.3

Gain Error

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

Offset Error

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

-1.6

Conversion Time

Free Running Conversion

260

µs

Clock Frequency

Single Ended Conversion

1000

kHz

AVCC

Analog Supply Voltage

CC - 0.3

CC + 0.3

VREF

Reference Voltage

1.0

AVCC

VIN

Input Voltage

GND

VREF

Input Bandwidth

TBD

kHz

INT1

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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