LMX1602| Datasheet

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LMX1600/LMX1601/LMX1602 PLLatinum Low Cost Dual Frequency Synthesizer

June 2005

LMX1600 2.0 GHz/500 MHz LMX1601 1.1 GHz/500 MHz LMX1602 1.1 GHz/1.1 GHz PLLatinumTM Low Cost Dual Frequency Synthesizer
General Description
The LMX1600/01/02 is part of a family of monolithic integrated dual frequency synthesizers designed to be used in a local oscillator subsystem for a radio transceiver. It is fabricated using National's 0.5u ABiC V silicon BiCMOS process. The LMX1600/01/02 contains two dual modulus prescalers, four programmable counters, two phase detectors and two selectable gain charge pumps necessary to provide the control voltage for two external loop filters and VCO loops. Digital filtered lock detects for both PLLs are included. Data is transferred into the LMX1600/01/02 via a MICROWIRETM serial interface (Data, Clock, LE). VCC supply voltage can range from 2.7V to 3.6V. The LMX1600/01/02 features very low current consumption typically 4.0 mA at 3V for LMX1601, 5.0 mA at 3V for LMX1600 or LMX1602. Powerdown for the PLL is hardware controlled. The LMX1600/01/02 is available in a 16 pin TSSOP surface mount plastic package.

Features
n VCC = 2.7V to 3.6V operation n Low current consumption: 4 mA @ 3V (typ) for LMX1601 5 mA @ 3V (typ) for LMX1600 or LMX1602 n PLL Powerdown mode: ICC = 1 uA typical n Digital Filtered Lock Detects n Dual modulus prescaler: -- 2 GHz/500 MHz option: (Main) 32/33 (Aux) 8/9 -- 1.1 GHz/500 MHz option: (Main) 16/17 (Aux) 8/9 -- 1.1 GHz/1.1 GHz option: (Main) 16/17 (Aux) 16/17

Applications
n Cordless / Cellular / PCS phones n Other digital mobile phones

Functional Block Diagram

10012901

TRI-STATE is a registered trademark of National Semiconductor Corporation. MICROWIRETM and PLLatinumTM are trademarks of National Semiconductor Corporation.

2005 National Semiconductor Corporation

DS100129

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