Datasheet > LM2326

LM2326

更新时间： 2024-11-18 22:47:07

品牌	Logo	应用领域
美国国家半导体 - NSC		半导体射频个人通信
页数	文件大小	规格书
19页	304K
描述
PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal Communications

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LM2326 数据手册

April 2000

LMX2306/LMX2316/LMX2326

™

PLLatinum Low Power Frequency Synthesizer for RF

Personal Communications

LMX2306

LMX2316

LMX2326

550 MHz

1.2 GHz

2.8 GHz

General Description

Features

n 2.3V to 5.5V operation

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.

n Ultra low current consumption

n 2.5V V_CCJEDEC standard compatible

n Programmable or logical power down mode:

— I_CC= 1 µA typical at 3V

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

n Dual modulus prescaler:

— LMX2306

— LMX2316/26

8/9

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)

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.

n Pagers

n Other wireless communication systems

Functional Block Diagram

DS100127-1

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

™

FastLock , PLLatinum and MICROWIRE are trademarks of National Semiconductor Corporation.

DS100127

www.national.com

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