SP5668 Datasheet, PDF (1/12 Pages) Mitel Networks Corporation – 2.7GHz 3-Wire Bus Controlled Synthesiser

SP5668
2.7GHz 3-Wire Bus Controlled Synthesiser
Preliminary Information
DS4538 - 1.6 January 1997
.
The SP5668 is a single chip frequency synthesiser
designed for tuning systems up to 2.7GHz.
The RF preamplifer contains a divide by two prescaler
which can be disabled for applications up to 2GHz so enabling
a step size equal to the comparison frequency up to 2GHz and
twice the comparison frequency up to 2.7GHz.
Comparison frequencies are obtained either from a crystal
controlled on–chip oscillator or from an external source.
The device contains three switching ports, P0 – P2,
together with an ’in–lock’ flag output. Various test modes
including varactor disable and charge pump disable are also
included.
FEATURES
s Complete 2.7GHz single chip system
s Optimised for low phase noise
s Selectable divide by two prescaler
s Selectable reference division ratio
s Charge pump disable
s Varactor line disable
s ‘In–lock’ flag
s Two selectable charge pump currents
s Three switching ports
s Reference frequency output
s ESD protection (Normal ESD handling procedures
should be observed)
CHARGE PUMP
CAP Q1
CRYSTAL Q2
ENABLE
DATA
CLOCK
PORT P2
PORT P1/OC
DRIVE
V_EE
RF INPUT
RF INPUT
V_CC
LOCK
REF
PORT P0/OC
Fig. 1 Pin connections - top view
MP16
APPLICATIONS
s SAT, TV, VCR and Cable tuning systems
s Communications systems
ORDERING INFORMATION
SP5668/KG/MP1S (Tubes,)
SP5668/KG/MP1T Tape and Reel)