323
8161D–AVR–10/09
ATmega48PA/88PA/168PA/328P
28.8
ADC Characteristics
Note:
1. AV
CC absolute min/max: 1.8V/5.5V
Table 28-7.
ADC Characteristics
Symbol
Parameter
Condition
Min
Typ
Max
Units
Resolution
10
Bits
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
2LSB
V
REF = 4V, VCC = 4V,
ADC clock = 1 MHz
4.5
LSB
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
Noise Reduction Mode
2LSB
V
REF = 4V, VCC = 4V,
ADC clock = 1 MHz
Noise Reduction Mode
4.5
LSB
Integral Non-Linearity (INL)
V
REF = 4V, VCC = 4V,
ADC clock = 200 kHz
0.5
LSB
Differential Non-Linearity
(DNL)
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
0.25
LSB
Gain Error
VREF = 4V, VCC = 4V,
ADC clock = 200 kHz
2LSB
Offset Error
V
REF = 4V, VCC = 4V,
ADC clock = 200 kHz
2LSB
Conversion Time
Free Running Conversion
13
260
s
Clock Frequency
50
1000
kHz
AVCC
Analog Supply Voltage
VCC - 0.3
VCC + 0.3
V
VREF
Reference Voltage
1.0
AV
CC
V
IN
Input Voltage
GND
V
REF
V
Input Bandwidth
38.5
kHz
V
INT
Internal Voltage Reference
1.0
1.1
1.2
V
RREF
Reference Input Resistance
32
k
Ω
RAIN
Analog Input Resistance
100
M
Ω