參數(shù)資料
型號(hào)： LMX2502
廠商： National Semiconductor Corporation
英文描述： PLLatinum⑩ Frequency Synthesizer System with Integrated VCO
中文描述： PLLatinum⑩頻率合成系統(tǒng)的集成VCO
文件頁(yè)數(shù)： 1/18頁(yè)
文件大?。?/td> 184K
代理商： LMX2502
LMX2502/LMX2512
PLLatinum
Frequency Synthesizer System with
Integrated VCO
General Description
LMX2502 and LMX2512 are highly integrated, high perfor-
mance, low power frequency synthesizer systems optimized
for Korean PCS and Korean Cellular CDMA (1xRTT, IS-95)
mobile handsets. Using a proprietary digital phase locked
loop technique, LMX2502 and LMX2512 generate very
stable, low noise local oscillator signals for up and down
conversion in wireless communications devices.
LMX2502 and LMX2512 include a voltage controlled oscil-
lator (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 synthesizer system. LMX2502 supports the
Korean PCS band and LMX2512 supports the Korean Cel-
lular band.
LMX2502 and LMX2512 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, LMX2502 and LMX2512 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.
LMX2502 and LMX2512 are available in a 28-pin leadless
leadframe package (LLP).
Features
n
Small Size
5.0 mm X 5.0 mm X 0.75 mm 28-Pin LLP Package
n
RF Synthesizer System
Integrated RF 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 Frequency
n
Supports Various Reference Frequencies
19.20/19.68 MHz
n
Fast Lock Time: 500 μs
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
n
Korean Cellular CDMA Systems
Functional Block Diagram
20068001
PLLatinum
is a trademark of National Semiconductor Corporation.
June 2003
L
2003 National Semiconductor Corporation
DS200680
www.national.com
相關(guān)PDF資料
PDF描述
LMX2505LQ1321 PLLatinu Dual Frequency Synthesizer System with Integrated VCOs
LMX2505LQX1321 PLLatinu Dual Frequency Synthesizer System with Integrated VCOs
LMX2505 PLLatinu Dual Frequency Synthesizer System with Integrated VCOs
LMX2525 PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
LMX2525LQ1321 PLLatinum Dual Frequency Synthesizer System with Integrated VCOs
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LMX25021635EVAL 制造商:OC White Company 功能描述:Evaluation Board For LMX2502 PLLatinum Frequency Synthesizer
LMX25021635EVAL/NOPB 功能描述:EVALUATION BOARD FOR LMX25021635 RoHS:是 類別:編程器，開(kāi)發(fā)系統(tǒng) >> 評(píng)估演示板和套件 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發(fā)器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板
LMX2502LQ1635 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
LMX2502LQ1635/NOPB 功能描述:鎖相環(huán) - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數(shù)量:1 最大輸入頻率:710 MHz 最小輸入頻率:0.002 MHz 輸出頻率范圍:0.002 MHz to 808 MHz 電源電壓-最大:3.63 V 電源電壓-最小:1.71 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:QFN-36 封裝:Tray
LMX2502LQ1635/S7001911 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:
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