SA8028W データシートの表示（PDF） - Philips Electronics

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SA8028W

2.5 GHz sigma delta fractional-N / 760 MHz IF integer frequency synthesizers

Philips Electronics 

Philips Semiconductors

2.5 GHz sigma delta fractional-N /

760 MHz IF integer frequency synthesizers

Product data

SA8028

18

CLOCK

DATA

19

2–BIT SHIFT

REGISTER

STROBE

20

ADDRESS DECODER

22–BIT SHIFT

REGISTER

CONTROL

LATCH

4

RFin+

RFin–

5

LOAD SIGNALS

SIGMA-DELTA

LATCH

RF DIVIDER

REFin+ 17

16

REFin–

IFin

11

LATCH

REF DIVIDER

2 2 22

SA

LATCH

IF DIVIDER

VDD

24

VDDpre

1

PUMP

CURRENT

SETTING

PUMP

BIAS

VDDCP

14

15

RSET

PHASE

DETECTOR

7

PHP

8

PHI

LOCK 22

DETECT

LOCK

PHASE

DETECTOR

10

PHA

23

TEST

2

GND

3

GNDPre

Figure 2. HBCC24 Block Diagram

6, 9

GNDCP

21

PON

SR02379

HBCC24 PIN DESCRIPTION

SYMBOL PIN

DESCRIPTION

VDDpre

GND

1 Prescaler supply voltage

2 Ground; digital

GNDPre

RFin+

3 Prescaler ground; analog

4 Input to RF divider (+)

RFin–

5 Input to RF divider (–)

GNDCP

PHP

6 Charge pump ground; analog

7 RF normal charge pump output

PHI

8 RF integral charge pump output

GNDCP

PHA

9 Charge pump ground; analog

10 IF charge pump output

IFin

11 Input to IF divider

N/C

12 Not connected

SYMBOL

N/C

VDDCP

RSET

REFin–

REFin+

CLOCK

DATA

STROBE

PON

LOCK

TEST

VDD

PIN

DESCRIPTION

13 Not connected

14 Charge pump supply voltage; analog

15 External resistor from this pin to ground

sets the charge pump current

16 Input to reference (–)

17 Input to reference (+)

18 Programming bus clock input

19 Programming bus data input

20 Programming bus enable input

21 Power-down control input

22 Lock detect output

23 Test (should be either grounded or

connected to VDD)

24 Supply; digital

2002 Feb 22

4

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