ATmega88 datasheet(306/340 Pages) ATMEL

306 / 340 page

306

7530H–AVR–02/09

ATmega48/88/168 Automotive

Figure 27-3. SPI Interface Timing Requirements (Slave Mode)

27.2

ADC Characteristics

MISO

(Data Output)

SCK

(CPOL = 1)

MOSI

(Data Input)

SCK

(CPOL = 0)

MSB

LSB

MSB

...

Table 27-3.

ADC Characteristics

Symbol

Parameter

Condition

Min

Typ

Max

Units

Resolution

Bits

Absolute accuracy (Including

INL, DNL, quantization error,

gain and offset error)

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

23.5

LSB

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

Noise Reduction Mode

23.5

LSB

Integral Non-Linearity (INL)

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.6

2.5

LSB

Differential Non-Linearity

(DNL)

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

0.30

1.0

LSB

Gain Error

VREF = 4V, VCC = 4V,

ADC clock = 200 kHz

-3.5

-1.3

3.5

LSB

Offset Error

REF = 4V, VCC = 4V,

ADC clock = 200 kHz

1.8

3.5

LSB

Conversion Time

Free Running Conversion

13 cycles

µs

Clock Frequency

200

kHz

AVCC

Analog Supply Voltage

VCC - 0.3

VCC + 0.3

VREF

Reference Voltage

1.0

AVCC

Input Voltage

GND

REF

Input Bandwidth

38.5

kHz

VINT

Internal Voltage Reference

1.0

1.1

1.2

RREF

Reference Input Resistance

25.6

38.4

RAIN

Analog Input Resistance

100

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