The SP8855E 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 devices in the series are the SP8852E which is a fully programmable device requiring two 16 bit words to set the RF and reference counters, and the SP8854E which has hard wired reference counter programming and requires a single bit word to program the RF divider. The SP8855E replaces the existing SP8855D.

FEATURES

■ 2.8GHz Operating Frequency (IG GRADE)

■ Single 5V Supply Operation

■ 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

■ Low cost plastic package option

■ GPS HI-REL level a screened option