The SP5659 is a single chip frequency synthesiser designed

for tuning systems up to 2·7GHz.

The RF preamplifier drives a divide-by two prescaler which

can be disabled for applications up to 2GHz, allowing direct

interfacing with the programmable divider, resulting in a step

size equal to the comparison frequency. For applications up

to 2·7GHz the divide-by two is enabled to give a step size of

twice the comparison frequency.

The comparison frequency is obtained either from an on-

chip crystal controlled oscillator or from an external source.

is ideally suited to providing the reference frequency for a

second synthesiser such as in a double conversion tuner (see

Fig. 5).

to one of four programmable addresses which are selected by

applying a specific voltage to the Address input. This feature

enables two or more synthesisers to be used in a system.

The SP5659 contains four switching ports, P0-P3 and a

The SP5659 also contains a varactor line disable and

charge pump disable facility.

FEATURES

SP5659

Preliminary Information

Supersedes March 1996 version, DS4206-1.8

DS4296 - 2.0 June 1998

SP5659

1

2

3

4

5

6

7

8

MP16

16

15

14

13

12

11

10

9

CHARGE PUMP

CRYSTAL

REF/COMP

ADDRESS

SDA

SCL

PORT P3

PORT P2

DRIVE

RF INPUT

RF INPUT

ADC

PORT P0

PORT P1

Fig. 1 Pin connections – top view

(1) Normal ESD handling precautions should be observed.

APPLICATIONS

THERMAL DATA

ORDERING INFORMATION

SP5659 KG/MP1S (Tubes)

SP5659 KG/MP1T (Tape and reel)