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參數資料
| 型號： | LMX2505LQX1321/NOPB |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC28 |
| 封裝： | 5 X 5 MM, 0.75 MM HEIGHT, LLP-28 |
| 文件頁數： | 1/16頁 |
| 文件大小： | 231K |
| 代理商： | LMX2505LQX1321/NOPB |
LMX2505
PLLatinum Dual Frequency Synthesizer System
with Integrated VCOs
General Description
LMX2505 is a highly integrated, high performance, low
power frequency synthesizer system optimized for dual-
band Japan PDC mobile handsets. Using a proprietary digi-
tal phase locked loop technique, LMX2505 generates very
stable, low noise local oscillator signals for up and down
conversion in wireless communications devices.
LMX2505 includes dual voltage controlled oscillators (VCOs)
for the upper and lower Japan PDC frequency bands, 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. The RF synthesizer system supports
two frequency bands: PDC1500 and PDC800.
Serial data is transferred to the device via a three-wire
MICROWIRE interface (DATA, LE, CLK).
Operating supply voltage ranges from 2.5 V to 3.3 V.
LMX2505 features low current consumption: 10 mA at 2.8 V
when operating in the PDC800 mode.
LMX2505 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 Package
n
RF Synthesizer System
Two Integrated VCOs
Integrated Loop Filter
Low Spurious, Low Phase Noise Fractional-N RF PLL
Based on 10-Bit Delta Sigma Modulator
Frequency Resolution Down to 20 kHz
n
Supports Various Reference Frequencies
12.6/14.4/25.2/26.0 MHz
n
Fast Lock Time: 300 s
n
Low Current Consumption
10 mA at 2.8 V in PDC800 Mode
n
2.5 V to 3.3 V Operation
n
Digital Filtered Lock Detect Output
n
Hardware and Software Power Down Control
Applications
n
Japan PDC Systems at 800 MHz and 1500 MHz
Frequency Bands.
Functional Block Diagram
20067107
FastLock is a trademark of National Semiconductor Corporation.
TRI-STATE is a registered trademark of National Semiconductor Corporation.
PLLatinum is a trademark of National Semiconductor Corporation.
April 2004
LMX2505
PLLatinum
Dual
Frequency
Synthesizer
System
with
Integrated
VCOs
2004 National Semiconductor Corporation
DS200671
www.national.com
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相關代理商/技術參數 |
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|---|---|
| LMX2512 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Frequency Synthesizer System with Integrated VCO |
| LMX25120967EVAL | 制造商:OC White Company 功能描述:Evaluation Board For LMX2522 PLLatinum Frequency Synthesizer System |
| LMX25120967EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LMX25120967 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:PLLatinum™ 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| LMX25121065EVAL/NOPB | 功能描述:EVALUATION BOARD FOR LMX25121065 RoHS:是 類別:編程器，開發系統 >> 評估演示板和套件 系列:PLLatinum™ 標準包裝:1 系列:PCI Express® (PCIe) 主要目的:接口，收發器，PCI Express 嵌入式:- 已用 IC / 零件:DS80PCI800 主要屬性:- 次要屬性:- 已供物品:板 |
| LMX2512LQ0967 | 功能描述:鎖相環 - PLL RoHS:否 制造商:Silicon Labs 類型:PLL Clock Multiplier 電路數量: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 |
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