SP5730
1.3GHz Low Phase Noise Frequency Synthesiser
Preliminary Information
DS4877
issue 1.9
July 1999
Features
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Complete 1.3GHz single chip system for
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Digital Terrestrial Television applications
Selectable reference division ratio, compatible
with (DTT) requirements
Optimised for low phase noise, with
comparison frequencies up to 4MHz
No RF prescaler
Selectable reference/comparison frequency
output
Four selectable I
2
C bus address
I
2
C fast mode compliant and compatible with
3.3 and 5V logic levels
Four switching ports
ESD protection, (Normal ESD Handling
procedures should be observed)
Ordering Information
SP5730A/KG/MP1S Sticks
SP5730A/KG/MP1T Tape and Reel
SP5730A/KG/QP1S Sticks
SP5730A/KG/QP1T Tape amd Reel
Description
The SP5730 is a single chip frequency synthesiser
designed for tuning systems up to 1.3GHz and is
optimised for digital terrestrial applications.
The RF preamplifier interfaces direct with the RF
programmable divider, which is of MN+A construction
so giving a step size equal to the loop comparison
frequency and no prescaler phase noise degradation
over the RF operating range.
The comparison frequency is obtained either from an
on-chip crystal controlled oscillator, or from an external
source. The oscillator frequency, Fref, or phase
comparator frequency, Fcomp, can be switched to the
REF/COMP output providing a reference frequency for
a second frequency synthesiser.
The synthesiser is controlled via an I
2
C bus and is fast
mode compliant. It can be hard wired to respond to one
of four addresses to enable two or more synthesisers to
be used on a common bus.
The device contains four switching ports P0-P3.
Applications
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Digital Satellite ,Cable and Terrestrial tuning
systems
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Communications systems
MITEL [ MITEL NETWORKS CORPORATION ]
