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参数资料
| 型号： | LMX2525LQ1321/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PLL FREQUENCY SYNTHESIZER, 26 MHz, QCC24 |
| 封装： | 5 X 4 MM, 0.75 MM HEIGHT, LLP-24 |
| 文件页数： | 1/17页 |
| 文件大小： | 237K |
| 代理商： | LMX2525LQ1321/NOPB |
LMX2525
PLLatinum Dual Frequency Synthesizer System
with Integrated VCOs
General Description
LMX2525 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, LMX2525 generates very
stable, low noise local oscillator signals for up and down
conversion in wireless communications devices.
LMX2525 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.
LMX2525 features low current consumption: 10 mA at 2.8 V
when operating in the PDC800 mode.
LMX2525 is available in a 24-pin leadless leadframe pack-
age (LLP).
Features
n
Small Size
5.0 mm X 4.0 mm X 0.75 mm 24-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 MHz, 14.4 MHz, 25.2MHz, and 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
20068907
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
LMX2525
PLLatinum
Dual
Frequency
Synthesizer
System
with
Integrated
VCOs
2004 National Semiconductor Corporation
DS200689
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2525LQX1321 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| LMX2525LQX1321/NOPB | 功能描述:IC FREQ SYNTH DUAL VCO 24-LLP RoHS:是 类别:RF/IF 和 RFID >> RF 其它 IC 和模块 系列:PLLatinum™ 标准包装:100 系列:* |
| LMX2531 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| LMX2531_07 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
| LMX25311146EVAL | 功能描述:时钟和定时器开发工具 LMX2531LQ1146 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 |
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