LMX2332LTM Datasheet

IC型號(hào)：
LMX2332LTM
PDF描述：
PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Pers...
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499.70KB
PDF頁數(shù)：
21頁
芯片廠家：
NSC

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LMX2330L/LMX2331L/LMX2332L PLLatinum Low Power Dual Frequency Synthesizer for RF

Personal Communications

June 1999

LMX2330L/LMX2331L/LMX2332L

PLLatinum

鈩?/div>

Low Power Dual Frequency Synthesizer for

RF Personal Communications

LMX2330L

LMX2331L

LMX2332L

2.5 GHz/510 MHz

2.0 GHz/510 MHz

1.2 GHz/510 MHz

Features

Ultra low current consumption

2.7V to 5.5V operation

Selectable synchronous or asynchronous powerdown

mode:

= 1 碌A(chǔ) typical at 3V

Dual modulus prescaler:

LMX2330L

(RF) 32/33 or 64/65

LMX2331L/32L

(RF) 64/65 or 128/129

LMX2330L/31L/32L (IF) 8/9 or 16/17

Selectable charge pump TRI-STATE

廬

mode

Selectable charge pump current levels

Selectable Fastlock

鈩?/div>

mode

Upgrade and compatible to LMX233XA family

General Description

The LMX233XL family of monolithic, integrated dual fre-

quency synthesizers, including prescalers, is to be used as a

local oscillator for RF and first IF of a dual conversion trans-

ceiver. It is fabricated using National鈥檚 0.5碌 ABiC V silicon

BiCMOS process.

The LMX233XL contains dual modulus prescalers. A 64/65

or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz

LMX2330L) can be selected for the RF synthesizer and a 8/9

or a 16/17 prescaler can be selected for the IF synthesizer.

LMX233XL, which employs a digital phase locked loop tech-

nique, combined with a high quality reference oscillator, pro-

vides the tuning voltages for voltage controlled oscillators to

generate very stable, low noise signals for RF and IF local

oscillators. Serial data is transferred into the LMX233XL via

a three wire interface (Data, Enable, Clock). Supply voltage

can range from 2.7V to 5.5V. The LMX233XL family features

very low current consumption;

LMX2330L 鈥?5.0 mA at 3V, LMX2331L 鈥?4.0 mA at 3V,

LMX2332L 鈥?3.0 mA at 3V.

The LMX233XL are available in a TSSOP 20-pin and CSP

24-pin surface mount plastic package.

Applications

Portable Wireless Communications

(PCS/PCN, cordless)

Cordless and cellular telephone systems

Wireless Local Area Networks (WLANs)

Cable TV tuners (CATV)

Other wireless communication systems

Functional Block Diagram

DS012806-1

TRI-STATE

廬

is a registered trademark of National Semiconductor Corporation.

Fastlock

鈩?/div>

, MICROWIRE

鈩?/div>

and PLLatinum

鈩?/div>

are trademarks of National Semiconductor Corporation.

漏 1999 National Semiconductor Corporation

DS012806

www.national.com

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