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參數(shù)資料
| 型號(hào)： | LMX2525 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Dual Frequency Synthesizer System with Integrated VCOs |
| 中文描述： | PLLatinum雙頻率合成系統(tǒng)的集成和VCO |
| 文件頁(yè)數(shù)： | 1/17頁(yè) |
| 文件大?。?/td> | 237K |
| 代理商： | LMX2525 |
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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 μs
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
L
2004 National Semiconductor Corporation
DS200689
www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2525LQ1321 | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述:IC PLL + VCO SMD 2525 LLP-24 |
| LMX2525LQ1321/NOPB | 功能描述:IC FREQ SYNTH DUAL W/VC0 24-LLP RoHS:是 類(lèi)別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
| LMX2525LQX1321 | 制造商:NSC 制造商全稱(chēng):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 類(lèi)別:RF/IF 和 RFID >> RF 其它 IC 和模塊 系列:PLLatinum™ 標(biāo)準(zhǔn)包裝:100 系列:* |
| LMX2531 | 制造商:NSC 制造商全稱(chēng):National Semiconductor 功能描述:High Performance Frequency Synthesizer System with Integrated VCO |
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