ATtiny44 datasheet(180/236 Pages) ATMEL

180 / 236 page

180

8006H–AVR–10/09

ATtiny24/44/84

20.7

ADC Characteristics – Preliminary Data

Note:

1. Values are preliminary.

Table 20-9.

ADC Characteristics, Single Ended Channels. T = -40

°C - 85°C

Symbol

Parameter

Condition

Min(1)

Typ(1)

Max(1)

Units

Resolution

Bits

Absolute accuracy

(Including INL, DNL, and

Quantization, Gain and Offset

Errors)

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

2.0

TBD

LSB

REF = 4V, VCC = 4V,

ADC clock = 1 MHz

2.5

TBD

LSB

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

Noise Reduction Mode

1.5

TBD

LSB

REF = 4V, VCC = 4V,

ADC clock = 1 MHz

Noise Reduction Mode

2.0

TBD

LSB

Integral Non-Linearity (INL)

(Accuracy after Offset and

Gain Calibration)

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

1.0

TBD

LSB

Differential Non-linearity

(DNL)

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.5

TBD

LSB

Gain Error

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

2.0

TBD

LSB

Offset Error

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

1.5

TBD

LSB

Conversion Time

Free Running Conversion

280

µs

Clock Frequency

1000

kHz

Input Voltage

GNDV

REF

Input Bandwidth

38.4

kHz

AREF

External Voltage Reference

2.0

VCC

INT

Internal Voltage Reference

1.0

1.1

1.2

RREF

Reference Input Resistance

RAIN

Analog Input Resistance

100

ADC Conversion Output

1023

LSB

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