Datasheet

167
ATtiny25/45/85 [DATASHEET]
2586Q–AVR–08/2013
21.7 ADC Characteristics
Note: 1. Values are guidelines only.
Table 21-8. ADC Characteristics, Single Ended Channels. T
A
= -40C to +85C
Symbol Parameter Condition Min Typ Max Units
Resolution 10 Bits
Absolute accuracy
(Including INL, DNL, and
Quantization, Gain and
Offset errors)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
2LSB
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1 MHz
3LSB
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
Noise Reduction Mode
1.5 LSB
V
REF
= 4V, V
CC
= 4V,
ADC clock = 1 MHz
Noise Reduction Mode
2.5 LSB
Integral Non-linearity (INL)
(Accuracy after offset and gain
calibration)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
1LSB
Differential Non-linearity (DNL)
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
0.5 LSB
Gain Error
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
2.5 LSB
Offset Error
V
REF
= 4V, V
CC
= 4V,
ADC clock = 200 kHz
1.5 LSB
Conversion Time Free Running Conversion 14 280 µs
Clock Frequency 50 1000 kHz
V
IN
Input Voltage GND V
REF
V
Input Bandwidth 38.4 kHz
AREF External Reference Voltage 2.0 V
CC
V
V
INT
Internal Voltage Reference 1.0 1.1 1.2 V
Internal 2.56V Reference
(1)
V
CC
> 3.0V 2.3 2.56 2.8 V
R
REF
32 k
R
AIN
Analog Input Resistance 100 M
ADC Output 0 1023 LSB