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LMX2306

National Semiconductor
Part Number LMX2306
Manufacturer National Semiconductor
Description Low Power Frequency Synthesizer
Published Apr 25, 2005
Detailed Description LMX2306/LMX2316/LMX2326 PLLatinum Low Power Frequency Synthesizer for RF Personal Communications April 2000 LMX2306/LM...
Datasheet PDF File LMX2306 PDF File

LMX2306
LMX2306

Overview
LMX2306/LMX2316/LMX2326 PLLatinum Low Power Frequency Synthesizer for RF Personal Communications April 2000 LMX2306/LMX2316/LMX2326 PLLatinum™ Low 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 local 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 provide the feedback tuning voltage for a voltage controlled oscillator 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 n n n n 2.
3V to 5.
5V operation Ultra low current consumption 2.
5V VCC JEDEC standard compatible Programmable or logical power down mode: — ICC = 1 µA typical at 3V Dual modulus prescaler: — LMX2306 8/9 — LMX2316/26 32/33 Selectable charge pump TRI-STATE ® mode Selectable FastLock™ mode with timeout counter MICROWIRE™ Interface Digital Lock Detect n n n n Applications n n n n n Portable wireless communications (PCS/PCN, cordless) Wireless Local Area Networks (WLANs) Cable TV tuners (CATV) Pagers Other wireless communication systems Functional Block Diagram DS100127-1 TRI-STATE ® is a registered trademark of National Semiconductor Corporati...


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