Datasheet

340
8021G–AVR–03/11
ATmega329P/3290P
28.10 ADC Characteristics – Preliminary Data
Table 28-11. ADC Characteristics
Symbol Parameter Condition Min. Typ Max Units
Resolution
Single Ended Conversion 10 Bits
Differential Conversion 8 Bits
Absolute accuracy (Including
INL, DNL, quantization error,
gain and offset error)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
22.5LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1MHz
2.5 LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
Noise Reduction Mode
2LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1MHz
Noise Reduction Mode
2.5 LSB
Integral Non-Linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
1.25 LSB
Differential Non-Linearity
(DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
0.25 LSB
Gain Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
2LSB
Offset Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
1.25 LSB
Conversion Time Free Running Conversion 13 260 µs
Clock Frequency Single Ended Conversion 50 1000 kHz
AVCC Analog Supply Voltage V
CC
- 0.3 V
CC
+ 0.3 V
V
REF
Reference Voltage
Single Ended Conversion 1.0 AVCC V
Differential Conversion 1.0 AVCC - 0.5 V
V
IN
Pin Input Voltage
Single Ended Channels GND V
REF
V
Differential Channels GND AVCC V
Input Range
Single Ended Channels GND V
REF
V
Differential Channels
(1)
-0.85V
REF
V
REF
V
Input Bandwidth
Single Ended Channels 38.5 kHz
Differential Channels 4 kHz