Datasheet

325
2467X–AVR–06/11
ATmega128
ADC Characteristics
Notes: 1. Values are guidelines only.
2. Minimum for AVCC is 2.7V.
3. Maximum for AVCC is 5.5V
Table 135. ADC Characteristics, Single Ended Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution Single Ended Conversion 10 Bits
Absolute Accuracy
(Including INL, DNL, Quantization Error, Gain
and Offset Error)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
1.5
LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 1MHz
3.25
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
Noise Reduction mode
1.5
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 1MHz
Noise Reduction mode
3.75
Integral Non-Linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
0.75
Differential Non-Linearity (DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
0.5
Gain Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
1
Offset error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
1
Clock Frequency 50 1000 kHz
Conversion Time 13 260 µs
AVCC Analog Supply Voltage V
CC
- 0.3
(2)
V
CC
+ 0.3
(3)
VV
REF
Reference Voltage 2.0 AVCC
V
IN
Input Voltage GND V
REF
Input Bandwidth 38.5 kHz
V
INT
Internal Voltage Reference 2.3 2.56 2.7 V
R
REF
Reference Input Resistance 32 kΩ
R
AIN
Analog Input Resistance 55 100 MΩ