
164
8048C–AVR–02/12
ATtiny43U
20.8
ADC Characteristics
Note:
1. Gain error also depends on the accuracy of the selected reference source. When using VCC as a reference it should be
noted that the output voltage of the boost converter has a wide dynamic range, especially in Active Low Current Mode. The
internal voltage reference is rather immune to variations in supply voltage and is therefore the recommended reference
Table 20-8.
ADC Characteristics, Single-Ended Conversion, T
A = -40°C to +85°C, Boost Converter Enabled.
Symbol
Parameter
Condition
Min
Typ
Max
Units
Resolution
10
Bits
(Including INL, DNL, and
quantization, Gain and Offset
Errors)
V
REF = VCC = 3V
ADC clock = 200 kHz
3.5
LSB
VREF = VCC = 3V
ADC clock = 1 MHz
4.0
LSB
VREF = VCC = 3V
ADC clock = 200 kHz
Noise Reduction Mode
3.0
LSB
VREF = VCC = 3V
ADC clock = 1 MHz
Noise Reduction Mode
3.5
LSB
Integral Non-linearity (INL)
(1)(Accuracy after Offset and
Gain Calibration)
V
REF = VCC = 3V
ADC clock = 200 kHz
1.0
LSB
Differential Non-linearity
(DNL)
VREF = VCC = 3V
ADC clock = 200 kHz
0.5
LSB
V
REF = VCC = 3V
ADC clock = 200 kHz
5.0
LSB
Offset Error
VREF = VCC = 3V
ADC clock = 200 kHz
-3.0
LSB
Conversion Time
Free Running Conversion
14
280
s
Clock Frequency
50
1000
kHz
V
IN
Input Voltage
GND
V
REF
V
Input Bandwidth
38.4
kHz
V
INT
Internal Voltage Reference
1.0
1.1
1.2
V
R
AIN
Analog Input Resistance
100
M
Ω