The SP8855D is one of a family of parallel load synthesisers containing all the elements apart from the loop amplifier to fabricate a PLL synthesis loop. Other parts in the series are the SP8852D which is a fully programmable device requiring two 16 bit words to set the RF and reference counters, and the SP8854D which has hard wired reference counter programming and requires a single bit word to program the RF divider.

FEATURES

■ 1.7GHz Operating Frequency

■ Single 5V Supply Operation

■ Low Power Consumption <1.3W

■ High Comparison Frequency 50MHz

■ High Gain Phase Detector 1mA/rad

■ Programmable Phase Detector Gain

■ Zero ‘‘Dead Band” Phase Detector

■ Wide range of RF and Reference Divide Ratios

■ Programming by Hard Wired Inputs