SP8853 - 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 div
SP8853A/B 1 3GHz Professional Synthesiser Supersedes March 1997 version, DS2352 - 3.0 DS2352 - 4.0 March 1998 The SP8853 is a low power single chip synthesiser intended for professional radio applications, containing all the elements (apart from the loop amplifier) required to build a PLL frequency synthesis loop The device is serially programmable by a three-wire data highway and contains three independent buffers to store one reference divider word and two local oscillator divider words.
SP8853 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 Frequenc
