Table 31-8. ADC Characteristics, Differential Channels
Symbol Parameter
Condition
Gain = 1x
Gain = 10x
Gain = 200x
Min(1)
Typ(1)
Max(1)
Units
Bits
8
8
7
Resolution
Bits
Bits
Gain = 1x
V
REF = 4V, VCC = 5V
18
17
9
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
LSB
CLKADC = 50 - 200 kHz
Gain = 10x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Absolute Accuracy(Including INL, DNL,
Quantization Error, Gain and Offset Error)
Gain = 200x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Gain = 1x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
2.5
5
Gain = 10x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Integral Non-Linearity (INL)
Gain = 200x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
9
Gain = 1x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
0.75
1.5
Gain = 10x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Differential Non-Linearity (DNL)
Gain = 200x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
10
Gain = 1x
Gain = 10x
Gain = 200x
1.7
1.7
0.5
%
%
%
Gain Error
Gain = 1x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
2
2
3
LSB
LSB
LSB
Gain = 10x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Offset Error
Gain = 200x
VREF = 4V, VCC = 5V
CLKADC = 50 - 200 kHz
Clock Frequency
Conversion Time
50
65
200
260
kHz
µs
380
ATmega640/1280/1281/2560/2561
2549L–AVR–08/07
ATMEL [ ATMEL ]
