SP8853B - Mitel Networks

SP8853B 13GHz Professional Synthesiser

Prescaler and AM Counter The programmable divider chain is of AM counter design and therefore contains a dual modulus front end prescaler, an A counter which controls the dual modulus ratio and an M counter which controls the bulk multi-modulus division. A programmable divider of this type has a division ratio of MN1A and a minimum integer steppable division.

Features

s Improved Digital Phase Detector Eliminates ‘Dead Band’ Effects s Low Operating Power, Typically 175mW s 1
·3GHz Operating Frequency s Complete Phase Locked Loop s High Input Sensitivity s Programmed throughThree-Wire Bus s Wide Range of Reference Division Ratios s Local Storage for Two Frequency Words, giving Rapid Frequency Toggling s Programmable Phase Detector Gain s Power Down Mode ABSOLUTE MAXIMUM RATINGS Supply voltage Storage temperature Prescaler input voltage 20
·3V to 17V 255°C to 1150°C 2
·5V p-p VCC2 HC28
*FPD and FREF outputs are reversed by the phase detector sense bit in the F.