ATmega32A datasheet(304/352 Pages) ATMEL

304 / 352 page

304

8155B–AVR–07/09

ATmega32A

Table 27-5.

ADC Characteristics, Differential channels, T

A = -40°C to 85°C

Symbol

Parameter

Condition

Min

Typ

Max

Units

Resolution

Gain = 1x

Bits

Gain = 10x

Bits

Gain = 200x

Bits

Absolute Accuracy

Gain = 1x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

LSB

Gain = 10x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

LSB

Gain = 200x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

7LSB

Integral Non-Linearity (INL)

(Accuracy after calibration for Offset and

Gain Error)

Gain = 1x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

0.75

LSB

Gain = 10x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

0.75

LSB

Gain = 200x

VREF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

2LSB

Gain Error

Gain = 1x

1.6

Gain = 10x

1.5

Gain = 200x

0.2

Offset Error

Gain = 1x

REF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

1LSB

Gain = 10x

REF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

1.5

LSB

Gain = 200x

REF = 4V, VCC = 5V

ADC clock = 50 - 200 kHz

4.5

LSB

Clock Frequency

200

kHz

Conversion Time

260

µs

AVCC

Analog Supply Voltage

CC - 0.3

(1)

CC + 0.3

(2)

VREF

Reference Voltage

2.0

AVCC - 0.5

Input voltage

GND

AVCC

VDIFF

Input differential voltage

-VREF/Gain

VREF/Gain/

ADC conversion output

-511

511

LSB

Input bandwith

4kHz

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