U2781B datasheet(7/10 Pages) TEMIC

Part #	U2781B

Description	Frequency Synthesizer

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Manufacturer	TEMIC [TEMIC Semiconductors]

Direct Link	http://www.temic.de

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U2781B

TELEFUNKEN Semiconductors

Rev. A3, 26-Nov-97

7 (10)

Typical Input Sensitivity

93 7789 e

RMS

mV

– 65

– 60

– 55

– 50

– 45

– 40

– 35

– 30

+10

+ 5

– 25

– 20

– 15

– 10

– 5

Frequency ( MHz )

dBm

( 50 Ohm)

0

200 400

600 800 1000

0

1600

1400

1200

.1

.2

1

2

5

10

20

50

100

200

500

1000

.5

( 50 Ohm)

Figure 6.

Application Circuit

94 8905

Loop filter

1

alternatively to

external TCXO

Tuning

voltage

10n

2 x 10p

LD

VCO

U2781B

1n

10k

10n

Enable

Clock

Data

m

VSCP = 3 to 6 V

VS = 3 V

Figure 7.

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U2781B Datasheet(PDF) 7 Page - TEMIC Semiconductors

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