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LMX2306 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LMX2306 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 19 page  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 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 FastLock™ mode with timeout counter n MICROWIRE™ Interface 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™, PLLatinum™ and MICROWIRE™ are trademarks of National Semiconductor Corporation. DS100127-1 April 2000 © 2000 National Semiconductor Corporation DS100127 www.national.com |
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