Datasheet

ATmega164A/PA/324A/PA/644A/PA/1284/P
 2018 Microchip Technology Inc. Data Sheet Complete DS40002070A-page 338
28.8 ADC characteristics
Notes: 1. Values are guidelines only.
Table 28-17. ADC characteristics, single ended channel
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
1.9
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
1.9
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1MHz
Noise Reduction Mode
3.25
Integral Non-Linearity (INL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
1.1
Differential Non-Linearity (DNL)
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
0.3
Gain Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
1.6
Offset Error
Single Ended Conversion
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
-1.5
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
VV
REF
Reference Voltage 1.0 AVCC
V
IN
Input Voltage GND V
REF
Input Bandwidth 38.5 kHz
V
INT1
Internal Voltage Reference 1.1V 1.0 1.1 1.2
V
V
INT2
Internal Voltage Reference 2.56V, V
CC
> 2.7V 2.33 2.56 2.79
R
REF
Reference Input Resistance 32 k
R
AIN
Analog Input Resistance 100 M