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Features
VCC = 2.7V to 3.6V operation
Low current consumption:
4 mA @ 3V (typ) for LMX1601
5 mA @ 3V (typ) for LMX1600 or LMX1602
PLL Powerdown mode: ICC = 1 µA typical
Digital Filtered Lock Detects
Dual modulus prescaler:
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2 GHz/500 MHz option:
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(Main) 32/33 (Aux) 8/9
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1.1 GHz/500 MHz option:
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(Main) 16/17 (Aux) 8/9
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1.1 GHz/1.1 GHz option:
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(Main) 16/17 (Aux) 16/17
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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 MICROWIRE
™ 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.
Applications
Cordless / Cellular / PCS phones
Other digital mobile phones
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