Datasheet

294
2503Q–AVR–02/11
ATmega32(L)
Table 122. ADC Characteristics, Differential channels, T
A
= -40°C to 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 - 200kHz
17
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
16
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
7
Integral Non-Linearity (INL)
(Accuracy after calibration for Offset and
Gain Error)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
0.75
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
0.75
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
2
Gain Error
Gain = 1x 1.6
%Gain = 10x 1.5
Gain = 200x 0.2
Offset Error
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
1
LSB
Gain = 10x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
1.5
Gain = 200x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200kHz
4.5
Clock Frequency 50 200 kHz
Conversion Time 65 260 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 AVCC
V
DIFF
Input differential voltage -V
REF
/Gain V
REF
/Gain
/
ADC conversion output -511 511 LSB
Input bandwith 4kHz