
375
7682C–AUTO–04/08
AT90CAN32/64/128
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 AVCC is 2.7 V.
4. Maximum for AVCC is 5.5 V
Table 27-6.
ADC Characteristics, Differential Channels
Symbol
Parameter
Condition
Units
Resolution
Differential Conversion
Gain = 1x or 10x
8
Bits
Differential Conversion
Gain = 200x
7
Bits
Absolute accuracy
Gain = 1x, or 10x
VREF = 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
1
4
LSB
Gain = 200x (7 bits)
VREF = 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
3
Integral Non-linearity (INL)
(Accuracy after Calibration
for Offset and Gain Error)
Gain = 1x, 10x or 200x
VREF = 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
0.5
3
LSB
Differential Non-linearity
(DNL)
0.4
3
LSB
Gain Error
Gain = 1x, 10x or 200x
– 4
0
+ 4
LSB
Offset Error
Gain = 1x, 10x or 200x
VREF = 4V, Vcc = 5V
ADC clock = 50 - 200 kHz
– 3
0
+ 3
LSB
Clock Frequency
Free Running Conversion
50
200
kHz
Conversion Time
Free Running Conversion
65
260
s
AVCC
Analog Supply Voltage
VCC – 0.3
VCC + 0.3
V
VREF
External Reference Voltage
Differential Conversion
2.0
AVCC - 0.5
V
VIN
Input voltage
Differential Conversion
0
AVCC
V
VDIFF
Input Differential Voltage
–VREF/Gain
+VREF/Gain
V
ADC Conversion Output
–511
511
LSB
Input bandwidth
Differential Conversion
4
kHz
VINT
Internal Voltage Reference
2.4
2.56
2.7
V
RREF
Reference Input Resistance
24
32
40
k
RAIN
Analog Input Resistance
100
M