SP8853 Datasheet (Zarlink Semiconductor) - 1.3 GHz Professional Synthesiser

SP8853, 1.3 GHz 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

SP8853 1.3 GHz Professional Synthesiser Data Sheet June 2003 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.

A digital phase detector with two charge pumps, progr

SP8853 Features

* s Improved Digital Phase Detector Eliminates HC28 ‘Dead Band’ Effects

* FPD and FREF outputs are reversed by the phase s Low Operating Power, Typically 175mW detector sense bit in the F1/F2 programming word. The above diagram is correct when the sense bit is low. See s 1

* 3GHz Operating Freque