Datasheet

337
ATmega169A/PA/329A/PA/649A/P/3290A/PA/6490A/P [DATASHEET]
8284E–AVR–02/2013
29.9 ADC characteristics
Notes: 1. Voltage difference between channels.
Table 29-18. ADC characteristics.
Symbol Parameter Condition Min. Typ. Max. Units
Resolution
Single Ended Conversion 10
Bits
Differential Conversion 8
Absolute accuracy
(Including INL, DNL,
quantization error, gain and
offset error)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
22.5
LSB
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 1MHz
2.5
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
Noise Reduction Mode
2
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 1MHz
Noise Reduction Mode
2.5
Integral Non-Linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
1.25
Differential Non-Linearity
(DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
0.25
Gain Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
2
Offset Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V, ADC clock = 200kHz
1.25
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
Differential Conversion 1.0 AVCC - 0.5
V
IN
Pin Input Voltage
Single Ended Channels GND V
REF
Differential Channels GND AVCC
Input Range
Single Ended Channels GND V
REF
Differential Channels
(1)
-
0.85V
REF
V
REF
Input Bandwidth
Single Ended Channels 38.5
kHz
Differential Channels 4
V
INT
Internal Voltage Reference 1.0 1.1 1.2 V
R
REF
Reference Input Resistance 32 k
R
AIN
Analog Input Resistance 100 M