SP5848
SP5848 is 3-Wire Bus Dual Low Phase Noise PLL manufactured by Zarlink Semiconductor.
Obsolescence Notice
This product is obsolete. This information is available for your convenience only.
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For more information on Zarlink’s obsolete products and replacement product lists, please visit http://products.zarlink./obsolete_products/
Preliminary Information
SP5848 SP5848
2.2/1.3GHz 3-Wire Bus Dual Low Phase Noise PLL Preliminary Information
DS5076 ISSUE 1.6 October 1999
Features
- Dual independent PLL frequency synthesisers in a single package, optimised for double conversion cable tuners, offering improved application 2.2GHz up-synthesiser optimised for low phase noise up to parison frequencies of 4MHz 1.3GHz down-synthesiser optimised for low phase noise AND small step size mon reference oscillator and divider with independently selectable ratios for each synthesiser 10:1 programmable charge pump current ratio in up synthesiser 3-Wire bus programmable, each synthesiser indepently addressable Low power consumption, typ 100m W at 5V ESD protection, (Normal ESD handling procedures should be observed)
Ordering Information
SP5848/KG/QP1S SP5848/KG/QP1T
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- Description
The SP5848 is a dual PLL frequency synthesizer controlled by a 3-wire bus optimised for application in double conversion tuners. Each synthesiser loop within the SP5848 is independently addressable and contains an RF programmable divider, phase/frequency detector and charge pump/loop amplifier section; a mon reference frequency oscillator and divider chain is provided, whose ratios for each loop are independently programmable. Both synthesisers are optimised for low phase noise performance and in addition synthesiser 2 is capable of operation with a low parison frequency.
Applications
- TV, VCR, and cable tuning systems
PUMP 1 11 BIT COUNT RF1 INPUT 16/17 4 BIT COUNT DRIVE 1
15 BIT LATCH 2 BIT LATCH DATA CLOCK ENABLE DATA INTERFACE 5 BIT LATCH 29 DIVIDE 2 BIT LATCH
PORT P0
PORT P1
16 BIT LATCH
1 BIT LATCH
PUMP 2 12 BIT COUNT RF 2...
