Datasheet
232
ATmega8A [DATASHEET]
8159E–AVR–02/2013
26.8 ADC Characteristics
Notes: 1. Values are guidelines only.
2. Minimum for
AV
CC
is 2.7V.
3. Maximum for
AV
CC
is 5.5V.
4. Maximum conversion time is 1/50kHz*25 = 0.5 ms.
Table 26-6. ADC Characteristics
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
1.75 LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 1MHz
3LSB
Integral Non-linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz 0.75 LSB
Differential Non-linearity
(DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz 0.5 LSB
Gain Error Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
1LSB
Offset Error Single Ended Conversion
V
REF
= 4V, V
CC
= 4V
ADC clock = 200kHz
1LSB
Conversion Time
(4)
Free Running Conversion 13 260 µs
Clock Frequency 50 1000 kHz
AV
CC
Analog Supply Voltage V
CC
- 0.3
(2)
V
CC
+ 0.3
(3)
V
V
REF
Reference Voltage 2.0 AV
CC
V
V
IN
Input voltage GND V
REF
V
Input bandwidth 38.5 kHz
V
INT
Internal Voltage Reference 2.3 2.56 2.8 V
R
REF
Reference Input Resistance 32 k
R
AIN
Analog Input Resistance 55 100 M