Datasheet

374
7682C–AUTO–04/08
AT90CAN32/64/128
27.8 ADC Characteristics(
(1)
Notes: 1. All DC Characteristics contained in this datasheet are based on simulation and characterization of other AVR microcontrol-
lers manufactured in the same process technology. These values are preliminary values representing design targets, and
will be updated after characterization of actual silicon.
2. Values are guidelines only.
3. Minimum for AV
CC
is 2.7 V.
4. Maximum for AV
CC
is 5.5 V
Table 27-5. ADC Characteristics, Single Ended Channels
Symbol Parameter Condition Min
(2)
Typ
(2)
Max
(2)
Units
Resolution Single Ended Conversion 10 Bits
Absolute accuracy
(Included INL, DNL,
Quantization Error, Gain and
Offset Error)
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
1.5 3 LSB
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
3 LSB
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
Noise Reduction Mode
1.5 3 LSB
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
Noise Reduction Mode
3 LSB
Integral Non-linearity (INL)
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
0.6 1.5 LSB
Differential Non-linearity (DNL)
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
0.3 1.5 LSB
Gain Error
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
– 3 0 + 3 LSB
Offset Error
Single Ended Conversion
V
REF
= 4V, Vcc = 4V
ADC clock = 200 kHz
– 2.5 1 + 2.5 LSB
Clock Frequency Free Running Conversion 50 1000 kHz
Conversion Time Free Running Conversion 65 260 µs
AV
CC
Analog Supply Voltage V
CC
– 0.3
(3)
V
CC
+ 0.3
(4)
V
V
REF
External Reference Voltage 2.0 AV
CC
V
V
IN
Input voltage GND V
REF
V
Input bandwidth 38.5 kHz
V
INT
Internal Voltage Reference 2.4 2.56 2.7 V
R
REF
Reference Input Resistance 24 32 40 kΩ
R
AIN
Analog Input Resistance 100 MΩ