SP5659 Overview
The RF preamplifier drives a divide-by two prescaler which can be disabled for applications up to 2GHz, allowing direct interfacing with the programmable divider, resulting in a step size equal to the parison frequency. For applications up to 2·7GHz the divide-by two is enabled to give a step size of twice the parison frequency. The parison frequency is obtained either from an onchip crystal controlled oscillator or...