Atmel ATtiny26, Manual

Page: 130 / 182

130
ATtiny26(L)
1477G–AVR–03/05
Notes: 1. Minimum for AVCC is 2.7V.
2. Maximum for AVCC is 5.5V.
Table 66. ADC Characteristics, Differential Channels, T
A
= -40
°
C to 85
°
C
Symbol Parameter Condition Min Typ Max Units
Resolution
Gain = 1x 10 Bits
Gain = 20x 10 Bits
Absolute Accuracy
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
24 LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
27 LSB
Integral Non-Linearity (INL)
(Accuracy after Calibration for Offset and
Gain Error)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
1.5 LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
2 LSB
Gain Error
Gain = 1x 2 %
Gain = 20x 2.5 %
Offset Error
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
4 LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
6 LSB
Clock Frequency 50 200 kHz
Conversion Time 26 65 µs
AVCC Analog Supply Voltage V
CC
- 0.3
(1)
V
CC
+ 0.3
(2)
V
V
REF
Reference Voltage 2.0 AVCC - 0.5 V
V
IN
Input Voltage GND V
CC
V
V
DIFF
Input Differential Voltage 0 V
REF
/Gain V
ADC Conversion Output 0 1023 LSB
Input Bandwidth 4 kHz
V
INT
Internal Voltage Reference 2.4 2.7 2.9 V
R
REF
Reference Input Resistance 32 k
Ω
R
AIN
Analog Input Resistance 100 M
Ω