ATtiny25 datasheet(153/196 Pages) ATMEL

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153

7598H–AVR–07/09

ATtiny25/45/85

22.4

ADC Characteristics – Preliminary Data

Note:

1. All DC Characteristics contained in this data sheet result from actual silicon characterization.

2. Minimum for AVCC is 2.7V.

3. Maximum for AVCC is 5.5V.

Table 22-3.

ADC Characteristics, Single Ended Channels. -40°C - 125°C. (1). PRELIMINARY

Symbol

Parameter

Condition

Min(1)

Typ(1)

Max(1)

Units

Resolution

Single Ended Conversion

Bits

Absolute accuracy (Including

INL, DNL, quantization error,

gain and offset error)

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

2LSB

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 1 MHz

3LSB

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

Noise Reduction Mode

1.5

LSB

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 1 MHz

Noise Reduction Mode

2.5

LSB

Integral Non-linearity (INL)

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

1LSB

Differential Non-linearity (DNL)

Single Ended Conversion

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.5

LSB

Gain Error

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

2.5

LSB

Offset Error

Single Ended Conversion

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

1.5

LSB

Conversion Time

Free Running Conversion

260

µs

Clock Frequency

1000

kHz

AVCC

Analog Supply Voltage

VCC - 0.3

(2)

VCC + 0.3

(3)

Input Voltage

GND

REF-50mV

Input Bandwidth

38.5

kHz

VINT

Internal Voltage Reference

1.0

1.1

1.2

RAIN

Analog Input Resistance

100

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