SA8027W 查看數據表（PDF） - Philips Electronics

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SA8027W

2.5 GHz low voltage, low power RF fractional-N/IF integer frequency synthesizer

Philips Electronics 

Philips Semiconductors

2.5 GHz low voltage, low power

RF fractional-N/IF integer frequency synthesizer

Product data

SA8027

17

CLOCK

18

DATA

2–BIT SHIFT

REGISTER

19

STROBE

ADDRESS DECODER

22–BIT SHIFT

REGISTER

CONTROL

LATCH

VDD

3

PUMP

CURRENT

SETTING

PUMP

BIAS

VDDCP

13

14

RSET

LOAD SIGNALS

RF/MAINin+

RF/MAINin–

5

6

AMP

16

REFin+

REFin–

15

LATCH

MAIN DIVIDER

LATCH

REFERENCE

DIVIDER

SM

2 2 22

SA

FRAC

COMP

PHASE

DETECTOR

8

PHP

9

PHI

LOCK

SELECT

1

LOCK

12

IF/AUXin

TEST

AMP

2

LATCH

AUX DIVIDER

PHASE

DETECTOR

4

GND

7, 10

GNDCP

Figure 3. Block Diagram (TSSOP20)

11

PHA

20

PON

SR02357

TSSOP20 PIN DESCRIPTION

SYMBOL PIN

DESCRIPTION

LOCK

1 Lock detect output

TEST

VDD

GND

2 Test (should be either grounded or

connected to VDD)

3 Digital supply

4 Digital ground

RFin+

5 RF input to main divider

RFin–

6 RF input to main divider

GNDCP

PHP

7 Charge pump ground

8 Main normal charge pump

PHI

9 Main integral charge pump

GNDCP

10 Charge pump ground

SYMBOL

PHA

AUXin

VDDCP

RSET

REFin–

REFin+

CLOCK

DATA

STROBE

PON

PIN

DESCRIPTION

11 Auxiliary charge pump output

12 Input to auxiliary divider

13 Charge pump supply voltage

14 External resistor from this pin to ground

sets the charge pump current

15 Reference input

16 Reference input

17 Programming bus clock input

18 Programming bus data input

19 Programming bus enable input

20 Power down control

2001 Aug 21

3

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