Datasheet

333
2490R–AVR–02/2013
ATmega64(L)
Table 136. ADC Characteristics, Differential Channels, -40C – 85C
Symbol Parameter Condition Min Typ Max Units
Resolution
Gain = 1x 10
BitsGain = 10x 10
Gain = 200x 10
Absolute Accuracy
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
16
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
16
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
8
Integral Non-Linearity (INL)
(Accuracy after Calibration for Offset and
Gain Error)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
0.75
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
0.75
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
2.5
Gain Error
Gain = 1x 1.6
%Gain = 10x 1.6
Gain = 200x 0.3
Offset Error
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
1.5
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
1
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
6
Clock Frequency 50 1000 kHz
Conversion Time 13 260 µs
AVCC Analog Supply Voltage V
CC
–0.3
(1)
V
CC
+ 0.3
(2)
V
V
REF
Reference Voltage 2.0 AVCC – 0.5
V
IN
Input Voltage GND V
CC
V
DIFF
Input Differential Voltage -V
REF
/Gain V
REF
/Gain
ADC Conversion Output -511 511 LSB
Input Bandwidth 4kHz