Philips Semiconductors

Product specification

SA7026

1.3GHz low voltage fractional-N dual synthesizer

2

1999 Nov 04

853–2159 22635

GENERAL DESCRIPTION

The SA7026 BICMOS device integrates programmable dividers,

charge pumps and a phase comparator to implement a

phase-locked loop. The device is designed to operate from 3 NiCd

cells, in pocket phones, with low current and nominal 3 V supplies.

The synthesizer operates at VCO input frequencies up to 1.3 GHz.

The synthesizer has fully programmable main, auxiliary and

reference dividers. All divider ratios are supplied via a 3-wire serial

programming bus.

Separate power and ground pins are provided to the analog and

digital circuits. The ground leads should be externally short-circuited

to prevent large currents flowing across the die and thus causing

The charge pump current (gain) is set by an external resistance at

operates within a wide voltage compliance range to provide a wider

tuning range.

FEATURES

SR01649

1

2

3

4

5

6

7

8

9

11

12

13

14

15

16

17

18

19

20

LOCK

TEST

GND

RFin+

RFin–

PHP

PHI

PON

STROBE

DATA

CLOCK

REFin+

REFin–

AUXin

PHA

10

Figure 1.

Pin Configuration

APPLICATIONS

QUICK REFERENCE DATA

SYMBOL

PARAMETER

CONDITIONS

MIN.

TYP.

MAX.

UNIT

Supply voltage

2.7

–

5.5

V

Analog supply voltage

2.7

–

5.5

V

Total supply current

Main and Aux. on

–

7.5

8.8

mA

Total supply current in power-down mode

–

1

–

µA

Input frequency

350

–

1300

MHz

Input frequency

10

–

550

MHz

Crystal reference input frequency

5

–

40

MHz

Maximum phase comparator frequency

–

4

MHz

Operating ambient temperature

–40

–

+85

°C

ORDERING INFORMATION

TYPE NUMBER

PACKAGE

TYPE NUMBER

NAME

DESCRIPTION

VERSION

SA7026DH

TSSOP20

Plastic thin shrink small outline package; 20 leads; body width 4.4 mm

SOT360–1