Datasheet > LMX2522LQX1635

LMX2522LQX1635

更新时间： 2024-11-20 22:12:11

品牌	Logo	应用领域
美国国家半导体 - NSC		半导体
页数	文件大小	规格书
18页	187K
描述
PLLatinum Frequency Synthesizer System with Integrated VCOs

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中文翻译

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LMX2522LQX1635 数据手册

June 2003

LMX2522/LMX2532

™

PLLatinum Frequency Synthesizer System with

Integrated VCOs

General Description

Features

n Small Size

LMX2522 and LMX2532 are highly integrated, high perfor-

mance, low power frequency synthesizer systems optimized

for Korean PCS (K-PCS) with GPS and Korean Cellular

(K-Cellular) with GPS, CDMA (1xRTT, IS-95) mobile hand-

sets. Using a proprietary digital phase locked loop tech-

nique, LMX2522 and LMX2532 generate very stable, low

noise local oscillator signals for up and down conversion in

wireless communications devices.

Small 5.0 mm x 5.0 mm x 0.75 mm 28-Pin LLP Package

n RF/GPS Synthesizer System

Integrated RF VCO

Integrated GPS VCO

Integrated Loop Filter

Low Spurious, Low Phase Noise Fractional-N RF PLL

Based on 11-bit Delta Sigma Modulator

10 kHz Frequency Resolution

n IF Synthesizer System

Integer-N IF PLL

Programmable Charge Pump Current Levels

Programmable Frequencies

n Supports Various Reference Oscillator Frequencies

19.20/19.68 MHz

n Fast Lock Time: 500 µs

n Low Current Consumption

17 mA at 2.8 V

LMX2522 and LMX2532 include a RF voltage controlled

oscillator (VCO), a GPS VCO, a loop filter, and a fractional-N

RF PLL based on a delta sigma modulator. In concert these

blocks form a closed loop RF and GPS synthesizer system.

LMX2522 supports the Korean PCS band with GPS and

LMX2532 supports the Korean Cellular band with GPS.

LMX2522 and LMX2532 include an Integer-N IF PLL also.

For more flexible loop filter designs, the IF PLL includes a

4-level programmable charge pump. Together with an exter-

nal VCO and loop filter, LMX2522 and LMX2532 make a

complete closed loop IF synthesizer system.

n 2.7 V to 3.3 V Operation

Serial data is transferred to the device via a three-wire

MICROWIRE interface (DATA, LE, CLK).

n Digital Filtered Lock Detect Output

n Hardware and Software Power Down Control

Operating supply voltage ranges from 2.7 V to 3.3 V.

LMX2502 and LMX2512 feature low current consumption:

17 mA at 2.8 V.

Applications

n Korean PCS CDMA Systems with GPS

n Korean Cellular CDMA Systems with GPS

LMX2522 and LMX2532 are available in a 28-pin leadless

leadframe package (LLP).

Functional Block Diagram

20067201

PLLatinum is a trademark of National Semiconductor Corporation.

DS200672

www.national.com

12 3 4 5 6 7...18

中文翻译

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与LMX2522LQX1635相关器件

型号	品牌	获取价格	描述	数据表
LMX2525	NSC	获取价格	PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
LMX2525LQ1321	NSC	获取价格	PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
LMX2525LQ1321/NOPB	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 26MHz, QCC24, 5 X 4 MM, 0.75 MM HEIGHT, LLP-24
LMX2525LQX1321	NSC	获取价格	PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
LMX2531	NSC	获取价格	PLLatinum High Performance Frequency Synthesizer System with Integrated VCO
LMX2531	TI	获取价格	selecting amplifiers, adcs, and clocks for high-performance signal paths
LMX2531_07	NSC	获取价格	High Performance Frequency Synthesizer System with Integrated VCO
LMX25311742	NSC	获取价格	High Performance Frequency Synthesizer System with Integrated VCO
LMX2531LQ	NSC	获取价格	High Performance Frequency Synthesizer System with Integrated VCO
LMX2531LQ1146E	NSC	获取价格	High Performance Frequency Synthesizer System with Integrated VCO

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