LMX1600_05 Datasheet, PDF (1/17 Pages) National Semiconductor (TI) – 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
PLLatinum^™ Low Cost Dual Frequency Synthesizer
General Description
The LMX1600/01/02 is part of a family of monolithic inte-
grated dual frequency synthesizers designed to be used in a
local oscillator subsystem for a radio transceiver. It is fabri-
cated 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 MICROWIRE™
serial interface (Data, Clock, LE).
V_CC 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 V_CC = 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: I_CC = 1 µA 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
TRI-STATE^® is a registered trademark of National Semiconductor Corporation.
MICROWIRE™ and PLLatinum™ are trademarks of National Semiconductor Corporation.
© 2005 National Semiconductor Corporation DS100129
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