LMX2312USLDX Datasheet

IC型號(hào)：
LMX2312USLDX
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PLLatinum⑩ Ultra Low Power Frequency Synthesizer for RF Per...
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LMX2310U/LMX2311U/LMX2312U/LMX2313U PLLatinum Ultra Low Power Frequency Synthesizer

for RF Personal Communications

December 2003

LMX2310U/LMX2311U/LMX2312U/LMX2313U

PLLatinum

鈩?/div>

Ultra Low Power Frequency Synthesizer for

RF Personal Communications

LMX2310U 2.5 GHz

LMX2311U 2.0 GHz

LMX2312U 1.2 GHz

LMX2313U 600 MHz

General Description

The LMX2310/1/2/3U are high performance frequency syn-

thesizers. The LMX2310/1/2U use a selectable, dual modu-

lus 32/33 and 16/17 prescaler. The LMX2313U uses a se-

lectable, dual modulus 16/17 and 8/9 prescaler. The device,

when combined with a high quality reference oscillator and a

voltage controlled oscillator, generates very stable, low noise

local oscillator signals for up and down conversion in wire-

less communication devices.

Serial data is transferred into LMX2310/1/2/3U via a three-

wire interface (Data, Enable, Clock) that can be directly

interfaced with low voltage baseband processors. Supply

voltage can range from 2.7V to 5.5V. LMX2310U features

very low current consumption, typically 2.3 mA at 3.0V.

The LMX2310/1/2/3U are manufactured using National鈥檚

0.5碌 ABiC V silicon BiCMOS process and is available in

20-pin CSP packages.

Features

RF operation up to 2.5 GHz

2.7V to 5.5V operation

Ultra Low Current Consumption

Low prescaler values

LMX2310/1/2U 32/33 or 16/17

LMX2313U 16/17 or 8/9

Excellent Phase Noise

Internal balanced, low leakage charge pump

Selectable Charge Pump Current Levels

Selectable Fastlock mode with Time-Out Counter

Low Voltage MICROWIRE interface (1.72V to V

)

Digital and Analog Lock Detect

Small 20-pad Thin Chip Scale Package

Applications

Cellular DCS, PCS, WCDMA telephone systems

Wireless Local Area Networks (WLAN)

Global Positioning Systems (GPS)

Other wireless communications systems

Functional Block Diagram

20043822

PLLatinum

鈩?/div>

is a trademark of National Semiconductor Corporation.

漏 2003 National Semiconductor Corporation

DS200438

www.national.com

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