LMX2347 datasheet(1/27 Pages) NSC

Part #	LMX2347

Description	PLLatinum??Frequency Synthesizer for RF Personal Communications

PDF	27 Pages

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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LMX2346/LMX2347

PLLatinum™ Frequency Synthesizer for RF Personal

Communications

LMX2346

2.0 GHz

LMX2347

2.5 GHz

General Description

The LMX2346/7 are high performance frequency synthesiz-

ers with an integrated 32/33 dual modulus prescaler. The

LMX2346 is designed for RF operation up to 2.0 GHz. The

LMX2347 is designed for RF operation up to 2.5 GHz. Using

a proprietary digital phase locked loop technique, the

LMX2346/7 generates very stable, low noise control signals

for UHF and VHF voltage controlled oscillators.

Serial data is transferred into the LMX2346/7 via a three-line

MICROWIRE interface (DATA, LE, CLOCK). Supply voltage

range is from 2.7V to 5.5V. The charge pump provides 4 mA

output current.

The LMX2346/7 are manufactured using National’s 0.5µ

ABiC V silicon BiCMOS process and is available in 16-pin

TSSOP and 16-pin CSP packages.

Features

n

RF operation up to 2.5 GHz

n

2.7V to 5.5V operation

n

Digital & Analog Lock Detect

n

32/33 Dual modulus prescaler

n

Excellent Phase Noise

n

Internal balanced, low leakage charge pump

n

Pin Compatible to LMX2323

Applications

n

Cellular DCS/PCS/3G infrastructure equipment

n

Wireless Local Area Networks (WLANs)

n

Other wireless communication systems

Functional Block Diagram

20038406

PLLatinum™ is a trademark of National Semiconductor Corporation.

June 2004

DS200384

www.national.com

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LMX2347 Datasheet(PDF) 1 Page - National Semiconductor (TI)

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