
342
8272E–AVR–04/2013
ATmega164A/PA/324A/PA/644A/PA/1284/P
28.8
ADC characteristics
Notes:
1. Values are guidelines only.
Table 28-17. ADC characteristics, single ended channel.
Symbol
Parameter
Condition
Units
Resolution
Single Ended Conversion
10
Bits
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200kHz
1.9
LSB
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 1MHz
3.25
Single Ended Conversion
V
REF = 4V, VCC = 4V,
ADC clock = 200kHz
Noise Reduction Mode
1.9
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 1MHz
Noise Reduction Mode
3.25
Integral Non-Linearity (INL)
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200kHz
1.1
Differential Non-Linearity (DNL)
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200kHz
0.3
Gain Error
Single Ended Conversion
V
REF = 4V, VCC = 4V,
ADC clock = 200kHz
1.6
Offset Error
Single Ended Conversion
VREF = 4V, VCC = 4V,
ADC clock = 200kHz
-1.5
Conversion Time
Free Running Conversion
13
260
s
Clock Frequency
Single Ended Conversion
50
1000
kHz
AVCC
Analog Supply Voltage
V
CC - 0.3
V
CC + 0.3
V
VREF
Reference Voltage
1.0
AVCC
V
IN
Input Voltage
GND
V
REF
Input Bandwidth
38.5
kHz
VINT1
Internal Voltage Reference
1.1V
1.0
1.1
1.2
V
INT2
Internal Voltage Reference
2.56V, V
CC > 2.7V
2.33
2.56
2.79
RREF
Reference Input Resistance
32
k
RAIN
Analog Input Resistance
100
M