3.3V Spread-Spectrum EconOscillator

6

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FREQUENCY % CHANGE vs.

SUPPLY VOLTAGE

VOLTAGE (V)

3.5

3.4

3.2 3.3

2.9 3.0 3.1

2.8

-0.80

-0.60

-0.40

-0.20

0

0.20

0.40

0.60

0.80

1.00

-1.00

2.7

3.6

OUTPUT LOADED WITH

12pF OSCILLOSCOPE PROBE

FREQUENCY = 66.6MHz

FREQUENCY % CHANGE vs.

TEMPERATURE

TEMPERATURE (

°C)

80

70

60

50

40

30

20

10

0

-10

-20

-30

-1.00

-0.50

0

0.50

1.00

1.50

-1.50

-40

90

FREQUENCY = 66.6MHz

OUTPUT LOADED WITH

12pF OSCILLOSCOPE PROBE

ACTIVE SUPPLY CURRENT

vs. SCL FREQUENCY

SCL FREQUENCY (kHz)

300

200

100

1

2

3

4

5

6

7

0

0

400

FREQUENCY = 66.6MHz

OUTPUT UNLOADED

DUTY CYCLE vs. VOLTAGE

VOLTAGE (V)

3.5

3.4

3.2 3.3

2.9 3.0 3.1

2.8

51

52

53

54

55

56

57

58

59

60

50

2.7

3.6

FREQUENCY = 66.6MHz

°C

OUTPUT LOADED WITH

12pF OSCILLOSCOPE PROBE

TEMPERATURE (

°C)

60

50

30

40

20

10

070

DUTY CYCLE vs. TEMPERATURE

51

52

53

54

55

56

57

58

59

60

50

FREQUENCY = 66.6MHz

OUTPUT LOADED WITH

12pF OSCILLOSCOPE PROBE

Typical Operating Characteristics

1

2

3

4

5

6

0

SUPPLY CURRENT vs. PRESCALER

PRESCALER (DECIMAL)

100

10

1

1000

OUPUT UNLOADED

-40

°C, +25°C, +85°C

0.5

1.0

1.5

2.0

2.5

3.0

3.5

4.0

0

SUPPLY CURRENT

vs. TEMPERATURE WITH OE = 0

TEMPERATURE (

°C)

80

70

60

50

40

30

20

10

0

-10

-20

-30

-40

90

FREQUENCY = 66.6MHz

OUTPUT UNLOADED

FREQUENCY = 206.4kHz

SHUTDOWN SUPPLY CURRENT

vs. TEMPERATURE

TEMPERATURE (

°C)

80

70

50 60

-10 0 10 20 30 40

-30 -20

0.2

0.4

0.6

0.8

1.0

1.2

1.4

1.6

1.8

2.0

0

-40

90

OUTPUT UNLOADED