SP5748 Datasheet, PDF (1/15 Pages) Mitel Networks Corporation – 2.4GHz Very Low Phase Noise PLL

SP5748
2.4GHz Very Low Phase Noise PLL
Advance Information
DS4875 - 1.3 November 1998
The SP5748 is a single chip frequency synthesiser
designed for tuning systems up to 2.4 GHz and is
optimized for low phase noise with comparison
frequencies up to 4 MHz. It is designed to be downwards
software compatible with the SP5658.
The RF programmable divider contains a front end dual
modulus 16/17 functioning over the full operating range
and allows for coarse tuning in the upconverter
application and fine tuning in the downconverter.
CHARGE PUMP
CRYSTAL CAP
CRYSTAL
ENABLE
DATA
CLOCK
PORT P1/OC
14
DRIVE
V_EE
RF INPUT
RF INPUT
V_CC
REF
PORT P0/OP
Comparison frequencies are obtained either from a
crystal controlled on-chip oscillator or from an external
source. a buffered reference frequency output is also
available to drive a second SP5748.
MP14
Figure1 Pin connections - top view
The device also contains 2 switching ports.
FEATURES
q Complete 2.4 GHz single chip system
(for faster device refer to to SP5768)
q Optimised for low phase noise, with comparison
frequencies up to 4 MHz
q No RF prescaler
q Selectable reference division ratio
q Reference frequency output
q Selectable charge pump current
q Integrated loop amplifier
q Two switching ports
q Low power replacement for SP5658 and 5668
q Downwards software compatible with SP5658
q ESD protection, (Normal ESD handling
procedures should be observed)
APPLICATIONS
q TV, VCR and Cable tuning systems
q Communications systems
ORDERING INFORMATION
SP5748/KG/MP1S (Tubes)
SP5748/KG/MP1T (Tape and Reel)