收藏本站
LMX2522/LMX2532
PLLatinum Frequency Synthesizer System with
Integrated VCOs
General Description
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.
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.
Serial data is transferred to the device via a three-wire
MICROWIRE interface (DATA, LE, CLK).
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.
LMX2522 and LMX2532 are available in a 28-pin leadless
leadframe package (LLP).
Features
n
Small Size
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 s
n
Low Current Consumption
17 mA at 2.8 V
n
2.7 V to 3.3 V Operation
n
Digital Filtered Lock Detect Output
n
Hardware and Software Power Down Control
Applications
n
Korean PCS CDMA Systems with GPS
n
Korean Cellular CDMA Systems with GPS
Functional Block Diagram
20067201
PLLatinum is a trademark of National Semiconductor Corporation.
June 2003
LMX2522/LMX2532
PLLatinum
Dual
Frequency
Synthesizer
System
with
Integrated
VCOs
2003 National Semiconductor Corporation
DS200672
www.national.com
发布紧急采购，3分钟左右您将得到回复。

采购需求

(若只采购一条型号，填写一行即可)

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

发布成功！您可以继续发布采购。也可以进入我的后台，查看报价

*型号 *数量 厂商 批号 封装
添加更多采购

我的联系方式

*
*
*
相关PDF资料
LMX2532LQX0967/NOPB PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28
LMX2522LQX1635/NOPB PLL FREQUENCY SYNTHESIZER, 19.68 MHz, QCC28
LNB003-01GT SIP3, IC SOCKET
LNB003-29GT SIP3, IC SOCKET
LNB003-29TT SIP3, IC SOCKET
LNB003-49GG SIP3, IC SOCKET
LNB003-51TT SIP3, IC SOCKET
LNB004-01TT SIP4, IC SOCKET
相关代理商/技术参数
LMX2541 制造商:NSC 制造商全称:National Semiconductor 功能描述:Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX25412060EVAL 功能描述:时钟和定时器开发工具 LMX25412060 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25412060EVAL/NOPB 功能描述:时钟和定时器开发工具 LMX25412060 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25412380EVAL/NOPB 功能描述:时钟和定时器开发工具 LMX25412380 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25412690EVAL/NOPB 功能描述:时钟和定时器开发工具 LMX25412690 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25413030EVAL/NOPB 功能描述:时钟和定时器开发工具 LMK2541SQ3030 EVAL KIT RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25413320EVAL/NOPB 功能描述:时钟和定时器开发工具 LMK2541SQ3320 EVAL KIT RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V
LMX25413740EVAL/NOPB 功能描述:时钟和定时器开发工具 LMX25413740 EVAL BOARD RoHS:否 制造商:Texas Instruments 产品:Evaluation Modules 类型:Clock Conditioners 工具用于评估:LMK04100B 频率:122.8 MHz 工作电源电压:3.3 V