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| ATMEGA8_08 Datasheet, PDF (248/308 Pages) ATMEL Corporation – 8-bit with 8K Bytes In-System Programmable Flash | |||
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ADC Characteristics
Table 103. ADC Characteristics
Symbol Parameter
Condition
Resolution
Single Ended Conversion
Absolute accuracy
(Including INL, DNL,
Quantization Error, Gain,
and Offset Error)
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 200 kHz
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 1 MHz
Integral Non-linearity (INL)
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 200 kHz
Differential Non-linearity
(DNL)
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 200 kHz
Gain Error
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 200 kHz
Offset Error
Conversion Time(4)
Single Ended Conversion
VREF = 4V, VCC = 4V
ADC clock = 200 kHz
Free Running Conversion
Clock Frequency
AVCC
VREF
VIN
Analog Supply Voltage
Reference Voltage
Input voltage
Input bandwidth
VINT
Internal Voltage Reference
RREF
Reference Input Resistance
RAIN
Analog Input Resistance
Notes: 1. Values are guidelines only.
2. Minimum for AVCC is 2.7V.
3. Maximum for AVCC is 5.5V.
4. Maximum conversion time is 1/50kHz*25 = 0.5 ms.
Min(1)
13
50
VCC - 0.3(2)
2.0
GND
2.3
55
Typ(1)
10
1.75
3
0.75
0.5
1
1
38.5
2.56
32
100
Max(1)
260
1000
VCC + 0.3(3)
AVCC
VREF
2.7
Units
Bits
LSB
LSB
LSB
LSB
LSB
LSB
µs
kHz
V
V
V
kHz
V
kΩ
MΩ
248 ATmega8(L)
2486TâAVRâ05/08
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