LMX2320

LMX2315 LMX2320 LMX2325 PLLatinum Frequency Synthesizer for RF Personal Communications LMX2325 2 5 GHz LMX2320 2 0 GHz LMX2315 1 2 GHz September 1996 LMX2315 LMX2320 LMX2325 PLLatinum TM Frequency Synthesizer for RF Personal Communications LMX2325 2 5 GHz LMX2320 2 0 GHz LMX2315 1 2 GHz General Description The LMX2315 2320 2325’s are high performance frequency synthesizers with integrated prescalers designed for RF operation up to 2 5 GHz They are fabricated using National’s ABiC IV BiCMOS process A 64 65 or a 128 129 divide ratio can be selected for the LMX2315 and LMX2320 RF synthesizer at input frequencies of up to 1 2 GHz and 2 0 GHz while 32 33 and 64 65 divide ratios are available in the 2 5 GHz LMX2325 Using a proprietary digital phase locked loop technique the LMX2315 2320 2325’s linear phase detector characteristics can generate very stable low noise signals for controlling a local oscillator Serial data is transferred into the LMX2320 and the LMX2325 via a three line MICROWIRETM interface (Data Enable Clock) Supply voltage can range from 2 7V to 5 5V The LMX2315 LMX2320 and the LMX2325 feature very low current consumption typically 6 mA 10 mA and 11 mA respectively The LMX2315 LMX2320 and the LMX2325 are available in a TSSOP 20-pin surface mount plastic package Features Y Y Y Y Y Y Y RF operation up to 2 5 GHz 2 7V to 5 5V operation Low current consumption Dual modulus prescaler LMX2325 32 33 or 64 65 LMX2320 LMX2315 64 65 or 128 129 Internal balanced low leak...