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SP5748KGMP1T Datasheet

  • SP5748KGMP1T

  • 2.4GHz Very Low Phase Noise PLL

  • 15頁(yè)

  • MITEL

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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.
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.
The device also contains 2 switching ports.
CHARGE PUMP
CRYSTAL CAP
CRYSTAL
ENABLE
DATA
CLOCK
PORT P1/OC
14
SPOT REF.
DRIVE
V
EE
RF INPUT
RF INPUT
V
CC
REF
PORT P0/OP
MP14
Figure1 Pin connections - top view
APPLICATIONS
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)
q
TV, VCR and Cable tuning systems
q
Communications systems
ORDERING INFORMATION
SP5748/KG/MP1S (Tubes)
SP5748/KG/MP1T (Tape and Reel)

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