Datasheet

337
7674F–AVR–09/09
ATmega164P/324P/644P
Note: 1. 8-bit resolution
2. 7-bit resolution
3. Vref = Vcm/2
Table 26-9. ADC Characteristics, Differential Channels
Symbol Parameter Condition Min
(1)
Typ
(1)
Max
(1)
Units
Resolution
Gain = 1x 8
BitsGain = 10x 8
Gain = 200x 7
TUE
Absolute Accuracy (Including
INL, DNL Quantization Error
and Offset Error)
Gain = 1x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
4.6 7
LSB
Gain = 10x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
4.8 8
Gain = 200x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(2)(3)
1.0 4
INL Integral Non-linearity
Gain = 1x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)
0.2 1.5
LSB
Gain = 10x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)
0.2 1.5
Gain = 200x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(2)
0.25 1.5
DNL Differential Non-linearity
Gain = 1x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)
0.2 1.0
LSB
Gain = 10x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)
0.2 1.0
Gain = 200x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(2)
0.25 1.0
Gain Error
Gain = 1x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
-12 -9 -4
LSB
Gain = 10x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
-12 -9 -4
Gain = 200x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(2)(3)
-3 -1 3
Offset Error
Gain = 1x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
-4 0.25 4
LSB
Gain = 10x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(1)(3)
-4 0.20 4
Gain = 200x, V
CC
=5 V, V
REF
= 4V
ADC clock = 200 kHz
(2)(3)
-3 0.20 3
Conversion Time 65 260 µs
Clock Frequency 50 200 kHz
AVCC Analog Supply Voltage
V
CC
-
0.3
V
CC
+
0.3
V
V
REF
Reference Voltage 2.56
AVCC
- 0.5
V
V
IN
Input Differential Voltage 0 AVCC V