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SP5748 - 2.4GHz Very Low Phase Noise PLL

Description

The SP5748 contains all the elements necessary, with the exception of a frequency reference, loop filter and external high voltage transistor, to control a varicap tuned local oscillator, so forming a complete PLL frequency synthesised source.

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 tuni.

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Datasheet preview – SP5748

Datasheet Details

Part number SP5748
Manufacturer Mitel Networks
File Size 295.93 KB
Description 2.4GHz Very Low Phase Noise PLL
Datasheet download datasheet SP5748 Datasheet
Additional preview pages of the SP5748 datasheet.

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Full PDF Text Transcription

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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.
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