ATTINY25B Datasheet, PDF (4/7 Pages) ATMEL Corporation – 8-bit Microcontroller with 8K Bytes In-System Programmable Flash

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1.4 ADC Characteristics
T_A = –40°C to +85°C, V_CC = 1.8V to 3.6V (unless otherwise noted)
Symbol Parameter
Condition
Min
Typ
Max
Units
Resolution
8
Bits
Absolute accuracy
(Including INL, DNL,
quantization error, gain
and offset error)
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
Noise Reduction Mode
2
3.5
LSB
2
3.5
LSB
Integral Non-Linearity
(INL)
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
0.6
2.5
LSB
Differential Non-Linearity
(DNL)
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
0.30
1.0
LSB
Gain Error
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
–3.5
–1.3
+3.5
LSB
Offset Error
V_REF = 2.7V, V_CC = 2.7V,
ADC clock = 200 kHz
1.8
3.5
LSB
Conversion Time
Free Running
Conversion
13 cycles
µs
Clock Frequency
50
200
kHz
AV_CC
V_REF
V_IN
Analog Supply Voltage
Reference Voltage
Input Voltage
Input Bandwidth
V_CC – 0.3
1.0
GND
V_CC + 0.3
V
AV_CC
V
V_REF-50mV
V
38.5
kHz
V_INT
R_REF
Internal Voltage Reference
Reference Input
Resistance
1.0
1.1
1.2
V
25.6
32
38.4
kΩ
R_AIN
Analog Input Resistance
100
MΩ
Notes: 1. “Max” means the highest value where the pin is guaranteed to be read as low
2. “Min” means the lowest value where the pin is guaranteed to be read as high
3. Although each I/O port can sink more than the test conditions (0.5 mA at V_CC = 1.8V) under steady state conditions
(non-transient), the following must be observed:
1] The sum of all IOL, for ports B0 - B5, should not exceed 50 mA.
If IOL exceeds the test condition, VOL may exceed the related specification. Pins are not guaranteed to sink current greater
than the listed test condition.
4. Although each I/O port can source more than the test conditions (0.5 mA at Vcc = 1.8V) under steady state conditions
(non-transient), the following must be observed:
1] The sum of all IOH, for ports B0 - B5 should not exceed 50 mA.
If IOH exceeds the test condition, VOH may exceed the related specification. Pins are not guaranteed to source current
greater than the listed test condition.
4 ATtiny25/45/85
7669D–AVR–04/10