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FCE433

1/2

90

0

×

×

Σ

27

×

TDA8050A

MODULATOR

CONVERTER

25

24

28

1

3

2

30

31

RF_OUT

OUTEN

BUF_OUT

BUF_OUTC

26

AVCC1

4

AGND2

18

9

AGND1

32

SW_CAP

29

AVCC2

8

7

6

5

CLK

I_IN

I_INC

Q_IN

Q_INC

15

14

DATA

16

EN

RF_OUTC

RF_IN

IF_FILT

RF_INC

IF_FILTC

FIXED

MAIN DIVIDER

DAC

3-WIRE BUS TRANCEIVER

DIGITAL

PHASE

COMPARATOR

DIGITAL

PHASE

COMPARATOR

CHARGE

PUMP

PROGRAM-

MABLE

CHARGE

PUMP

PROGRAMMABLE

REF DIVIDER

PROGRAMMABLE

MAIN DIVIDER

PROGRAMMABLE

REF DIVIDER

10

12

11

17

22

21

20

19

CP_MOD

TKAMOD

TKBMOD

TKACONV

OSC_IN

TKBCONV

TUNECONV

CP_CONV

23

LOCK

13

DVCC

DGND

Fig.1 Block diagram.