音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LMX2542LQX2121 Datasheet

  • LMX2542LQX2121

  • PLLatinum Cellular and GPS Frequency Synthesizer System with...

  • 22頁(yè)

  • NSC

掃碼查看芯片數(shù)據(jù)手冊(cè)

上傳產(chǎn)品規(guī)格書(shū)

PDF預(yù)覽

LMX2542 PLLatinum Cellular and GPS Frequency Synthesizer System with Integrated VCOs
May 2004
LMX2542
PLLatinum
TM
Cellular and GPS Frequency Synthesizer
System with Integrated VCO
General Description
LMX2542 is a highly integrated, high performance, low
power frequency synthesizer system optimized for Cellular-
CDMA 1xRTT and IS-95 mobile handsets and data systems
with GPS capabilities. Using a proprietary digital phase
locked loop technique, LMX2542 provides very stable, low
noise local oscillator (LO) signals for up and down conver-
sion in wireless communications devices.
LMX2542 includes a Voltage Controlled Oscillator (VCO) for
both the Cellular-CDMA and GPS frequency bands, a loop
filter, and a Fractional-N RF PLL based on a Delta Sigma
(鈭單? modulator. In concert, these blocks form a closed loop
RF synthesizer system. The RF synthesizer system oper-
ates from 2087.73 MHz to 2155.14 MHz.
LMX2542 includes an Integer-N IF PLL also. For more flex-
ible loop filter designs, the IF PLL includes a 4-level pro-
grammable charge pump. Together with an external VCO
and loop filter, LMX2542 makes a complete closed loop IF
synthesizer system. The default IF frequency is 367.20 MHz.
Serial data is transferred to the device via a three-wire
MICROWIRE
TM
interface (DATA, LE, CLK).
Operating supply voltage ranges from 2.7V to 3.3V.
LMX2542 features low current consumption: 22 mA at 2.8V.
LMX2542 is available in a 28-Pin Leadless Leadframe Pack-
age (LLP).
Features
n
Small Size
5.0 mm x 5.0 mm x 0.75 mm 28-Pin LLP
n
RF Synthesizer System
Integrated RF VCO
Integrated Loop Filter
Low Spurious, Low Phase Noise Fractional-N RF
PLL Based on 11-Bit
鈭單?/div>
modulator
5 kHz Frequency Resolution
Cellular-CDMA LO: 2105.28 MHz to 2155.14 MHz
(Requires an External LO /2 Circuit)
GPS LO: 2087.73 MHz
(Requires an External LO /1.5 Circuit)
n
IF Synthesizer System
Integer-N IF PLL
Programmable Charge Pump Current Levels
IF LO: 367.20 MHz
n
Supports Various Reference Oscillator Frequencies:
19.20 MHz/ 19.68 MHz
n
Low Current Consumption:
22 mA typical at 2.8V
n
2.7V to 3.3V Operation
n
RF Digital Filtered Lock Detect Output
n
Hardware and Software Powerdown Control
Applications
n
Cellular-CDMA 1xRTT and IS-95 Mobile Handsets with
GPS
n
Cellular-CDMA 1xRTT and IS-95 Mobile Data Systems
with GPS
Leadless Leadframe Package (LQA28A)
20082411
PLLatinum
鈩?/div>
, MICROWIRE
鈩?/div>
are trademarks of National Semiconductor Corporation.
TRI-STATE
廬
is a registered trademark of National Semiconductor Corporation.
漏 2004 National Semiconductor Corporation
DS200824
www.national.com

LMX2542LQX2121相關(guān)型號(hào)PDF文件下載

  • 型號(hào)
    版本
    描述
    廠商
    下載
  • 英文版
    1.9 GHz Power Amplifier
    NSC
  • 英文版
    1.9 GHz Power Amplifier
    NSC [Natio...
  • 英文版
    0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer for RF Personal...
    NSC
  • 英文版
    0.1 GHz to 2.0 GHz Low Noise Amplifier/Mixer for RF Personal...
    NSC [Natio...
  • 英文版
    Intermediate Frequency Receiver
    NSC
  • 英文版
    Intermediate Frequency Receiver
    NSC [Natio...
  • 英文版
    PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Co...
    NSC
  • 英文版
    PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Co...
    NSC [Natio...
  • 英文版
    PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Co...
    NSC
  • 英文版
    PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Co...
    NSC [Natio...
  • 英文版
    PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal ...
    NSC
  • 英文版
    PLLatinum⑩ Low Power Frequency Synthesizer for RF Personal ...
    NSC [Natio...
  • 英文版
    PLLatinum⑩ Ultra Low Power Frequency Synthesizer for RF Per...
    NSC
  • 英文版
    PLLatinum⑩ Ultra Low Power Frequency Synthesizer for RF Per...
    NSC [Natio...
  • 英文版
    PLLatinum⑩ Ultra Low Power Frequency Synthesizer for RF Per...
    NSC
  • 英文版
    PLLatinum⑩ Ultra Low Power Frequency Synthesizer for RF Per...
    NSC [Natio...
  • 英文版
    1.2 GHz Frequency Synthesizer for RF Personal Communications
    NSC
  • 英文版
    1.2 GHz Frequency Synthesizer for RF Personal Communications
    NSC [Natio...
  • 英文版
    Frequency Synthesizer for RF Personal Communications
    NSC
  • 英文版
    1.2 GHz Frequency Synthesizer for RF Personal Communications
    NSC [Natio...

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時(shí)間周一至周五
9:00-17:30

關(guān)注官方微信號(hào)，
第一時(shí)間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫(kù)提出的寶貴意見(jiàn)，您的參與是維庫(kù)提升服務(wù)的動(dòng)力！意見(jiàn)一經(jīng)采納，將有感恩紅包奉上哦！