LMX1501A

LMX1501A LMX1511 PLLatinum 1 1 GHz Frequency Synthesizer for RF Personal Communications November 1995 LMX1501A LMX1511 PLLatinum TM 1 1 GHz Frequency Synthesizer for RF Personal Communications General Description The LMX1501A and the LMX1511 are high performance frequency synthesizers with integrated prescalers designed for RF operation up to 1 1 GHz They are fabricated using National’s ABiC IV BiCMOS process The LMX1501A and the LMX1511 contain dual modulus prescalers which can select either a 64 65 or a 128 129 divide ratio at input frequencies of up to 1 1 GHz Using a proprietary digital phase locked loop technique the LMX1501A 11’s linear phase detector characteristics can generate very stable low noise local oscillator signals Serial data is transferred into the LMX1501A and the LMX1511 via a three line MICROWIRETM interface (Data Enable Clock) Supply voltage can range from 2 7V to 5 5V The LMX1501A and the LMX1511 feature very low current consumption typically 6 mA at 3V The LMX1501A is available in a JEDEC 16-pin surface mount plastic package The LMX1511 is available in a TSSOP 20-pin surface mount plastic package Features Y Y Y Y Y Y RF operation up to 1 1 GHz 2 7V to 5 5V operation Low current consumption ICC e 6 mA (typ) at VCC e 3V Dual modulus prescaler 64 65 or 128 129 Internal balanced low leakage charge pump Small-outline plastic surface mount JEDEC 0 150 wide (1501A) or TSSOP 0 173 wide (1511) package Applications Y Y Y Y Cellular telephone systems (A...