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LMX1601
PLLatinum Low Cost Dual Frequency Synthesizer 1.1 GHz/500 MHz
LMX1600/LMX1601/LMX1602
PLLatinum™ Low Cost Dual Frequency Synthesizer
LMX1600 2.0 GHz/500 MHz
LMX1601 1.1 GHz/500 MHz
LMX1602 1.1 GHz/1.1 GHz
General DescriptionThe LMX1600/01/02is partofa familyof monolithic
integrated dual frequency synthesizers designedtobe useda local oscillator subsystemfora radio transceiver.Itis
fabricated using National’s 0.5u ABiCV silicon BiCMOS
process.
The LMX1600/01/02 contains two dual modulus prescalers,
four programmable counters, two phase detectors and two
selectable gain charge pumps necessaryto provide the
control voltagefor two external loop filters and VCO loops.
Digital filtered lock detectsfor both PLLs are included. Data transferred into the LMX1600/01/02viaa MICROWIRE™
serial interface (Data, Clock, LE).
VCC supply voltage can range from 2.7Vto 3.6V. The
LMX1600/01/02 features very low current consumption-
typically 4.0 mAat 3V for LMX1601, 5.0 mAat 3V for
LMX1600or LMX1602. Powerdownforthe PLLis hardware
controlled.
The LMX1600/01/02is availableina16pin TSSOP surface
mount plastic package.
Features VCC= 2.7Vto 3.6V operation Low current consumption:
4mA@3V (typ)for LMX1601
5mA@3V (typ)for LMX1600or LMX1602 PLL Powerdown mode: ICC=1μA typical Digital Filtered Lock Detects Dual modulus prescaler:2 GHz/500 MHz option: (Main) 32/33 (Aux) 8/91.1 GHz/500 MHz option: (Main) 16/17 (Aux) 8/91.1 GHz/1.1 GHz option: (Main) 16/17 (Aux) 16/17
Applications Cordless/ Cellular/ PCS phones Other digital mobile phones
Functional Block DiagramDS100129-1
PRELIMINARYAugust 2000
LMX1600/LMX1601/LMX1602
PLLatinum
Low
Cost
Dual
Frequency
Synthesizer
