Table 26-7. ADC Characteristics in Differential Mode - TA = –40°C to +125°C, VCC = 2.7V to 5.5V (unless otherwise noted)
Parameter
Condition
Symbol
Min
Typ
8
Max
Unit
Differential conversion, gain = 5x
Differential conversion, gain = 10x
Differential conversion, gain = 20x
Differential conversion, gain = 40x
8
Resolution
Bits
8
8
Gain = 5x, 10x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
1.5
1.5
1.5
0.1
0.2
0.3
0.7
0.1
0.2
0.3
3.5
4.0
Gain = 20x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
Absolute accuracy
TUE
LSB
Gain = 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
4.5
Gain = 5x, 10x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
1.5
Gain = 20x, VCC = 5V,
2.5
VREF = 2.56V, ADC clock = 2MHz
Integral non-linearity
INL
LSB
Gain = 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 1MHz
3.5
Gain = 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
4.5
Gain = 5x, 10x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
1.0
Gain = 20x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
Differential non-linearity
DNL
1.5
LSB
LSB
Gain = 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
2.5
Gain = 5x, 10x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
–3.0
–3.0
–3.0
+3.0
+3.0
+3.0
Gain error
Gain = 20x, 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
Gain = 5x, 10x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
Offset error
Ref voltage
LSB
V
Gain = 20x, 40x, VCC = 5V,
VREF = 2.56V, ADC clock = 2MHz
–4.0
2.56
+4.0
VREF
AVCC – 0.5
ATmega16/32/64/M1/C1 [DATASHEET]
281
7647O–AVR–01/15
MICROCHIP [ MICROCHIP ]
