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LMX2306 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2306
Description  PLLatinum™ Low Power Frequency Synthesizer for RF Personal Communications
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Maker  NSC [National Semiconductor (TI)]
Homepage  http://www.national.com
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LMX2306 Datasheet(HTML) 1 Page - National Semiconductor (TI)

 
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LMX2306/LMX2316/LMX2326
PLLatinumLow Power Frequency Synthesizer for RF
Personal Communications
LMX2306
550 MHz
LMX2316
1.2 GHz
LMX2326
2.8 GHz
General Description
The LMX2306/16/26 are monolithic, integrated frequency
synthesizers with prescalers that are designed to be used to
generate a very stable low noise signal for controlling the lo-
cal oscillator of an RF transceiver. They are fabricated using
National’s ABiC V silicon BiCMOS 0.5µ process.
The LMX2306 contains a 8/9 dual modulus prescaler while
the LMX2316 and the LMX2326 have a 32/33 dual modulus
prescaler. The LMX2306/16/26 employ a digital phase
locked loop technique. When combined with a high quality
reference oscillator and loop filter, the LMX2306/16/26 pro-
vide the feedback tuning voltage for a voltage controlled os-
cillator to generate a low phase noise local oscillator signal.
Serial data is transferred into the LMX2306/16/26 via a three
wire interface (Data, Enable, Clock). Supply voltage can
range from 2.3V to 5.5V. The LMX2306/16/26 feature ultra
low current consumption; LMX2306 - 1.7 mA at 3V,
LMX2316 - 2.5 mA at 3V, and LMX2326 - 4.0 mA at 3V.
The LMX2306/16/26 synthesizers are available in a 16-pin
TSSOP surface mount plastic package.
Features
n
2.3V to 5.5V operation
n
Ultra low current consumption
n
2.5V V
CC JEDEC standard compatible
n
Programmable or logical power down mode:
—I
CC = 1 µA typical at 3V
n
Dual modulus prescaler:
— LMX2306
8/9
— LMX2316/26
32/33
n
Selectable charge pump TRI-STATE® mode
n
Selectable FastLockmode with timeout counter
n
MICROWIREInterface
n
Digital Lock Detect
Applications
n
Portable wireless communications (PCS/PCN, cordless)
n
Wireless Local Area Networks (WLANs)
n
Cable TV tuners (CATV)
n
Pagers
n
Other wireless communication systems
Functional Block Diagram
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
FastLock, PLLatinumand MICROWIREare trademarks of National Semiconductor Corporation.
DS100127-1
April 2000
© 2000 National Semiconductor Corporation
DS100127
www.national.com


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