LMX2316LBX Datasheet

IC型號(hào)：
LMX2316LBX
PDF描述：
FREQUENCY SYNTHESIZER|BICMOS|LLCC|16PIN|PLASTIC
文件大小：
360.02KB
PDF頁數(shù)：
19頁
芯片廠家：
ETC

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LMX2306/LMX2316/LMX2326 PLLatinum Low Power Frequency Synthesizer for RF Personal

Communications

May 2000

LMX2306/LMX2316/LMX2326

PLLatinum

鈩?/div>

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鈥檚 ABiC V silicon BiCMOS 0.5碌 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 - 4.7 mA at 3V.

The LMX2306/16/26 synthesizers are available in a 16-pin

TSSOP surface mount plastic package.

Features

2.3V to 5.5V operation

Ultra low current consumption

2.5V V

JEDEC standard compatible

Programmable or logical power down mode:

鈥?I

= 1 碌A(chǔ) typical at 3V

Dual modulus prescaler:

鈥?LMX2306

8/9

鈥?LMX2316/26

32/33

Selectable charge pump TRI-STATE

廬

mode

Selectable FastLock

鈩?/div>

mode with timeout counter

MICROWIRE

鈩?/div>

Interface

Digital Lock Detect

Applications

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

廬

is a registered trademark of National Semiconductor Corporation.

FastLock

鈩?/div>

, PLLatinum

鈩?/div>

and MICROWIRE

鈩?/div>

are trademarks of National Semiconductor Corporation.

漏 2000 National Semiconductor Corporation

DS100127

www.national.com

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