ATmega32A datasheet(303/352 Pages) ATMEL

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303

8155B–AVR–07/09

ATmega32A

27.8

ADC Characteristics

Notes:

1. Minimum for AVCC is 2.7V.

2. Maximum for AVCC is 5.5V.

Table 27-4.

ADC Characteristics, Single Ended channels, T

A = -40°C to 85°C

Symbol

Parameter

Condition

Min

Typ

Max

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

1.5

LSB

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 1 MHz

3LSB

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 200 kHz

Noise Reduction mode

1.5

LSB

Single Ended Conversion

REF = 4V, VCC = 4V

ADC clock = 1 MHz

Noise Reduction mode

3LSB

Integral Non-Linearity (INL)

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 200 kHz

0.75

LSB

Differential Non-linearity (DNL)

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 200 kHz

0.25

LSB

Gain Error

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 200 kHz

0.75

LSB

Offset Error

Single Ended Conversion

VREF = 4V, VCC = 4V

ADC clock = 200 kHz

0.75

LSB

Clock Frequency

1000

kHz

Conversion Time

260

µs

AVCC

Analog Supply Voltage

CC - 0.3

(1)

CC + 0.3

(2)

VREF

Reference Voltage

2.0

AVCC

VIN

Input voltage

GND

VREF

ADC conversion output

1023

LSB

Input bandwith

38.5

kHz

VINT

Internal Voltage Reference

2.3

2.56

2.7

RREF

Reference Input Resistance

RAIN

Analog Input Resistance

100

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