Datasheet

179
8183F–AVR–06/12
ATtiny24A/44A/84A
Table 20-9. ADC Characteristics, Differential Channels (Bipolar Mode), 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
(Including INL, DNL, and Quantization, Gain
and Offset Errors)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
8LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
8LSB
Integral Non-Linearity (INL)
(Accuracy after Offset and Gain Calibration)
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
4LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
5LSB
Gain Error
Gain = 1x 4 LSB
Gain = 20x 5 LSB
Offset Error
Gain = 1x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
3LSB
Gain = 20x
V
REF
= 4V, V
CC
= 5V
ADC clock = 50 - 200 kHz
4LSB
Conversion Time Free Running Conversion 70 280 µs
Clock Frequency 50 200 kHz
V
IN
Input Voltage GND V
CC
V
V
DIFF
Input Differential Voltage V
REF
/Gain V
Input Bandwidth 4kHz
A
REF
External Reference Voltage 2.0 V
CC
- 1.0 V
V
INT
Internal Voltage Reference 1.0 1.1 1.2 V
R
REF
Reference Input Resistance 32 kΩ
R
AIN
Analog Input Resistance 100 MΩ
ADC Conversion Output -512 511 LSB