7

SP5668

Fig. 5a Typical input sensitivity (Prescaler disabled, PE=0)

Fig. 6. Example of double conversion from VHF/UHF frequencies to TV IF

Fig. 5b Typical input sensitivity (Prescaler enabled, PE=1)

Fig. 7. typical application, SP5668

300

100

40

10

1000

2000

3000

FREQUENCY (MHz)

3500

OPERATING

WINDOW

1000

2000

2700

3000

FREQUENCY (MHz)

3500

300

OPERATING

WINDOW

300

100

40

10

VIN

(mV RMS

INTO 50

Ω)

VIN

(mV RMS

INTO 50

Ω)

100

80

80

50

CONTROL

MICRO

15nF

68pF

+30V

+5V

22k

16k

47k

+12V

2n2

BCW31

1n

1n

10n

P2

TUNER

OSCILLATOR

OUTPUT

13k3

P0

LOCK

CLOCK

DATA

ENABLE

Optional application utilising

on–board crystal controlled

oscillator

1

14

2

3

4

5

6

7

13

12

11

10

89

15

16

P1

4MHz

18pF

2

3

39pF

REFERENCE

VCO

VCO

10nF

50 - 900MHz

38.9MHz

1650-2700MHz

2

3

10

3

1.6GHZ