LMX5080

LMX5080 PLLatinum 2.7 GHz Low Power Dual Modulus Prescaler for RF Personal Communications PRELIMINARY April 1999 LMX5080 PLLatinum™ 2.7 GHz Low Power Dual Modulus Prescaler for RF Personal Communications General Description The LMX5080 integrated dual modulus prescaler, is designed to be used in a synthesized local oscillator for 2.5 GHz wireless transceivers. It is fabricated using National’s 0.5µ ABiCV silicon BiCMOS process. The LMX5080 contains three dual modulus prescalers. Either a 128/130, 256/158 or a 512/514 prescaler can be selected for up to 2.7 Gz RF input frequencies. The prescaler inputs can be driven either differentially, or single ended with the use of a coupling capacitor on one of the inputs to ground. The LMX5080 CMOS output is optimized to generate very stable, low switching noise output signals. The LMX5080 prescaler can be used in conjunction with a low frequency Phase Lock Loop to form a frequency synthesizer suitable for UHF transceivers. Supply voltage can range from 2.7V to 5.5V. The LMX5080 features low current consumption; typically 7.0 mA at 5V VCC The LMX5080 is available in a 8-pin Small Outline (SOP) surface mount plastic package. Features 2.7V to 5.5V operation Low current consumption: 7 mA (typ) @ 5V −40˚C to +85˚C low noise CMOS output Selectable dual modulus prescaler 128/130 256/258 512/514 n 8-pin small package outline (SOP) n n n n Applications n 2.5 GHz wireless communications systems (ISM) n Direct Broadcast Satellite systems (DBS...