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Микропроцессорные системы

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ATmega8535(L)

ADC Characteristics

Table 114. ADC Characteristics, Single Ended Channels

Symbol	Parameter	Condition	Min(1)	Typ(1)	Max(1)	Units
	Resolution	Single Ended Conversion		10		Bits

		Single Ended Conversion
		VREF = 4V, VCC = 4V		1.5		LSB
		ADC clock = 200 kHz

		Single Ended Conversion
		VREF = 4V, VCC = 4V		3		LSB
	Absolute Accuracy	ADC clock = 1 MHz

		Single Ended Conversion
	(Including INL, DNL, Quantization Error, Gain	Single Ended Conversion
	(Including INL, DNL, Quantization Error, Gain	VREF = 4V, VCC = 4V
	and Offset Error)	VREF = 4V, VCC = 4V		1.5		LSB
	and Offset Error)	ADC clock = 200 kHz		1.5		LSB
		ADC clock = 200 kHz
		Noise Reduction mode

		Single Ended Conversion
		VREF = 4V, VCC = 4V		3		LSB
		ADC clock = 1 MHz		3		LSB
		ADC clock = 1 MHz
		Noise Reduction mode

		Single Ended Conversion
	Integral Non-Linearity (INL)	VREF = 4V, VCC = 4V		0.75		LSB
		ADC clock = 200 kHz

		Single Ended Conversion
	Differential Non-Linearity (DNL)	VREF = 4V, VCC = 4V		0.25		LSB
		ADC clock = 200 kHz

		Single Ended Conversion
	Gain Error	VREF = 4V, VCC = 4V		0.75		LSB
		ADC clock = 200 kHz

		Single Ended Conversion
	Offset error	VREF = 4V, VCC = 4V		0.75		LSB
		ADC clock = 200 kHz

	Clock Frequency		50		1000	kHz

	Conversion Time		13		260	µs

AVCC	Analog Supply Voltage		VCC - 0.3(2)		VCC + 0.3(3)	V
VREF	Reference Voltage		2.0		AVCC	V
VIN	Input Voltage		GND		VREF	V
	ADC Conversion Output		0		1023	LSB

	Input Bandwidth			38.5		kHz

VINT	Internal Voltage Reference		2.3	2.56	2.7	V
RREF	Reference Input Resistance			32		kΩ
RAIN	Analog Input Resistance			100		MΩ

Notes: 1. Values are guidelines only.

2.Minimum for AVCC is 2.7V.

3.Maximum for AVCC is 5.5V

263

2502K–AVR–10/06

Table 115. ADC Characteristics, Differential Channels

Symbol	Parameter	Condition		Min(1)	Typ(1)	Max(1)	Units
		Gain =	1x			10	Bits

	Resolution	Gain =	10x			10	Bits

		Gain = 200x				10	Bits

		Gain = 1x
		VREF = 4V, VCC = 5V			18		LSB
		ADC clock = 50 - 200 kHz

		Gain = 10x
	Absolute Accuracy	VREF = 4V, VCC = 5V			18		LSB
		ADC clock = 50 - 200 kHz

		Gain = 200x
		VREF = 4V, VCC = 5V			6		LSB
		ADC clock = 50 - 200 kHz

		Gain = 1x
		VREF = 4V, VCC = 5V			0.75		LSB
		ADC clock = 50 - 200 kHz
	Integral Non-Linearity (INL)
	Integral Non-Linearity (INL)	Gain = 10x
	(Accuracy after Calibration for Offset and	VREF = 4V, VCC = 5V			0.75		LSB
	Gain Error)	ADC clock = 50 - 200 kHz

		Gain = 200x
		VREF = 4V, VCC = 5V			3.5		LSB
		ADC clock = 50 - 200 kHz

		Gain =	1x		1.7		%

	Gain Error	Gain =	10x		1.6		%

		Gain = 200x			0.3		%

		Gain = 1x
		VREF = 4V, VCC = 5V			2		LSB
		ADC clock = 50 - 200 kHz

		Gain = 10x
	Offset Error	VREF = 4V, VCC = 5V			2.5		LSB
		ADC clock = 50 - 200 kHz

		Gain = 200x
		VREF = 4V, VCC = 5V			3.5		LSB
		ADC clock = 50 - 200 kHz

	Clock Frequency			50		200	kHz

	Conversion Time			65		260	µs

AVCC	Analog Supply Voltage			VCC - 0.3(2)		VCC + 0.3(3)	V
VREF	Reference Voltage			2.0		AVCC- 0.5	V
VIN	Input Voltage			GND		VCC	V
VDIFF	Input Differential Voltage			-VREF/Gain		VREF/Gain	V
	ADC Conversion Output			-511		511	LSB

	Input Bandwidth				4		kHz

264 ATmega8535(L)

2502K–AVR–10/06

ATmega8535(L)

Table 115. ADC Characteristics, Differential Channels (Continued)

Symbol	Parameter	Condition	Min(1)	Typ(1)	Max(1)	Units
VINT	Internal Voltage Reference		2.3	2.56	2.7	V
RREF	Reference Input Resistance			32		kΩ
RAIN	Analog Input Resistance			100		MΩ

Notes: 1. Values are guidelines only.

2.Minimum for AVCC is 2.7V.

3.Maximum for AVCC is 5.5V.

265

2502K–AVR–10/06

ATmega8535 Typical

Characteristics

Active Supply Current

The following charts show typical behavior. These figures are not tested during manufacturing. All current consumption measurements are performed with all I/O pins configured as inputs and with internal pull-ups enabled. A sine wave generator with rail- to-rail output is used as clock source.

The power consumption in Power-down mode is independent of clock selection.

The current consumption is a function of several factors such as: Operating voltage, operating frequency, loading of I/O pins, switching rate of I/O pins, code executed and ambient temperature. The dominating factors are operating voltage and frequency.

The current drawn from capacitive loaded pins may be estimated (for one pin) as CL*VCC*f where CL = load capacitance, VCC = operating voltage and f = average switching frequency of I/O pin.

The parts are characterized at frequencies higher than test limits. Parts are not guaranteed to function properly at frequencies higher than the ordering code indicates.

The difference between current consumption in Power-down mode with Watchdog Timer enabled and Power-down mode with Watchdog Timer disabled represents the differential current drawn by the Watchdog Timer.

Figure 130. Active Supply Current vs. Frequency (0.1 - 1.0 MHz)

ACTIVE SUPPLY CURRENT vs. FREQUENCY

0.1 - 1.0 MHz

	2
	2
	1.8												5.5V
	1.8

	1.6												5.0V
	1.6

	1.4												4.5V
	1.4

(mA)	1.2												4.0V
	1.2

	1												3.3V
	1												3.3V
CC													3.0V
I	0.8												3.0V
													2.7V


	0.6
	0.6
	0.4
	0.4
	0.2
	0.2
	0
	0
	0	0.1	0.2	0.3	0.4		0.5	0.6	0.7	0.8	0.9	1
						Frequency (MHz)

266 ATmega8535(L)

2502K–AVR–10/06

ATmega8535(L)

Figure 131. Active Supply Current vs. Frequency (1 - 16 MHz)

ICC (mA)

ACTIVE SUPPLY CURRENT vs. FREQUENCY

1 - 16 MHz

5.5V

5.0V

4.5V

4.0V

3.3V

3.0V

2.7V

Frequency (MHz)

Figure 132. Active Supply Current vs. VCC (Internal RC Oscillator, 8 MHz)

ACTIVE SUPPLY CURRENT vs. VCC

ICC (mA)

INTERNAL RC OSCILLATOR, 8 MHz

18
18
16							-40°C
16

14							25°C
14

12							85°C
12
10
10
8
8
6
6
4
4
2
2
0
0

2.5 3 3.5 4 4.5 5 5.5

VCC (V)

267

2502K–AVR–10/06

Figure 133. Active Supply Current vs. VCC (Internal RC Oscillator, 4 MHz)

ICC (mA)

ACTIVE SUPPLY CURRENT vs. VCC

INTERNAL RC OSCILLATOR, 4 MHz

	8	-40°C
	8
	7	25°C
	7	85°C
		85°C
	6

2.5

3.5

4.5

5.5

VCC (V)

Figure 134. Active Supply Current vs. VCC (Internal RC Oscillator, 2 MHz)

ICC (mA)

ACTIVE SUPPLY CURRENT vs. VCC

INTERNAL RC OSCILLATOR, 2 MHz

4.5

4		-40°C

25°C

3.5

85°C

2.5

1.5

0.5

2.5

3.5

4.5

5.5

VCC (V)

268 ATmega8535(L)

2502K–AVR–10/06

ATmega8535(L)

Figure 135. Active Supply Current vs. VCC (Internal RC Oscillator, 1 MHz)

ACTIVE SUPPLY CURRENT vs. VCC

INTERNAL RC OSCILLATOR, 1 MHz

2.5

2		-40°C

25°C

85°C

1.5

ICC (mA)

0.5

2.5

3.5

4.5

5.5

VCC (V)

Figure 136. Active Supply Current vs. VCC (32 kHz External Oscillator)

ICC (mA)

ACTIVE SUPPLY CURRENT vs. VCC

32kHz EXTERNAL OSCILLATOR

0.08

0.07

25°C

0.06

0.05

0.04

0.03

0.02

0.01

2.5

3.5

4.5

5.5

VCC (V)

269

2502K–AVR–10/06

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