Datasheet

378
2549O–AVR–05/12
ATmega640/1280/1281/2560/2561
Table 31-10. ADC Characteristics, Differential Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution
Gain = 1× 8
BitsGain = 10× 8
Gain = 200× 7
Absolute Accuracy(Including INL, DNL,
Quantization Error, Gain and Offset Error)
Gain = 1×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
18
LSB
Gain = 10×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
17
Gain = 200×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
9
Integral Non-Linearity (INL)
Gain = 1×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
2.5
Gain = 10×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
5
Gain = 200×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
9
Differential Non-Linearity (DNL)
Gain = 1×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
0.75
Gain = 10×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
1.5
Gain = 200×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
10
Gain Error
Gain = 1× 1.7
%Gain = 10× 1.7
Gain = 200× 0.5
Offset Error
Gain = 1×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
2
LSB
Gain = 10×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
2
Gain = 200×
V
REF
= 4V, V
CC
= 5V
CLK
ADC
= 50 - 200kHz
3
Clock Frequency 50 200 kHz
Conversion Time 65 260 µs