Datasheet

Symbol Parameter Condition Min.
(1)
Typ Max Units
Offset Error V
REF
= 4V, V
CC
= 4V,
ADC clock = 200kHz
- -1.5 - LSB
Conversion Time Free Running Conversion 13 - 260 μs
Clock Frequency 50 - 1000 kHz
AV
CC
(1)
Analog Supply Voltage V
CC
- 0.3 - V
CC
+ 0.3 V
V
REF
Reference Voltage 1.0 - AV
CC
V
V
IN
Input Voltage GND - V
REF
V
Input Bandwidth - 38.5 - kHz
V
INT
Internal Voltage Reference 1.0 1.1 1.2 V
R
REF
Reference Input Resistance - 32 - kΩ
R
AIN
Analog Input Resistance - 100 - MΩ
Note:
1. Values are guidelines only.
Table 29-12. ADC Characteristics, Differential Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution Gain = 1× - 10 - Bits
Gain = 10× - 10 -
Gain = 200× - 7 -
Absolute
Accuracy
(Including
INL, DNL
Quantization
Error and
Offset Error)
Gain = 1×,
V
CC
= 5V,
V
REF
= 4V
ADC clock =
200 kHz
- 19.5 - LSB
Gain = 10×,
V
CC
= 5 V,
V
REF
= 4V
ADC clock =
200 kHz
- 20.5 -
Gain = 200×,
V
CC
= 5V,
V
REF
= 4V
ADC clock =
200 kHz
- 8.5 -
Atmel ATmega644A [DATASHEET]
Atmel-42716C-ATmega644A_Datasheet_Complete-10/2016
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