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| 型号： | LMX2353TMX/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | PLL合成/DDS/VCOs |
| 英文描述： | PHASE LOCKED LOOP, 2500 MHz, PDSO16 |
| 封装： | LEAD FREE, PLASTIC, TSSOP-16 |
| 文件页数： | 1/16页 |
| 文件大小： | 209K |
| 代理商： | LMX2353TMX/NOPB |
LMX2353
PLLatinum Fractional N Single 2.5 GHz Frequency
Synthesizer
General Description
The LMX2353 is a monolithic integrated fractional N fre-
quency synthesizer, designed to be used in a local oscillator
subsystem for a radio transceiver. It is fabricated using Na-
tional’s 0.5 ABiC V silicon BiCMOS process. The LMX2353
contains dual modulus prescalers along with modulo 15 or
16 fractional compensation circuitry in the N divider. A 16/17
or 32/33 prescale ratio can be selected for the LMX2353. Us-
ing a fractional N phase locked loop technique, the LMX2353
can generate very stable low noise control signals for UHF
and VHF voltage controlled oscillators (VCO’s).
The LMX2353 has a highly flexible 16 level programmable
charge pump supplies output current magnitudes from 100
A to 1.6 mA. Serial data is transferred into the LMX2353 via
a three wire interface (Data, LE, Clock). Supply voltage can
range from 2.7V to 5.5V. The LMX2353 features very low
current consumption; typically 4.5 mA at 3.0V. The LMX2353
is available in a 16-pin TSSOP or a 16-pad CSP surface
mount plastic package.
Features
n 2.7V – 5.5V operation
n Low Current Consumption
I
CC = 4.5 mA typ @ VCC = 3.0V
n Programmable or Logical Power Down Mode
I
CC =5A typ @ VCC = 3.0V
n Modulo 15 or 16 fractional N divider
Supports ratios of 1, 2, 3, 4, 5, 8, 15, or 16
n Programmable charge pump current levels
100 A to 1.6 mA in 100 A steps
n Digital Filtered Lock Detect
Applications
n Portable wireless communications (PCS/PCN, cordless)
n Zero blind slot TDMA systems
n Cellular and Cordless telephone systems
n Spread spectrum communication systems (CDMA)
Functional Block Diagram
MICROWIRE and PLLatinum are trademarks of National Semiconductor Corporation.
TRI-STATE is a registered trademark of National Semiconductor Corporation.
DS101124-1
PRELIMINARY
June 1999
LMX2353
PLLatinum
Fractional
N
Single
2.5
GHz
Frequency
Synthesizer
1999 National Semiconductor Corporation
DS101124
www.national.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LMX2354 | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer |
| LMX2354SLB | 制造商:NSC 制造商全称:National Semiconductor 功能描述:PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer |
| LMX2354SLBX | 制造商:Rochester Electronics LLC 功能描述: 制造商:Texas Instruments 功能描述: |
| LMX2354SLBX/NOPB | 功能描述:IC FREQ SYNTH DUAL 24-LAMCSP RoHS:是 类别:集成电路 (IC) >> 时钟/计时 - 时钟发生器，PLL，频率合成器 系列:PLLatinum™ 标准包装:39 系列:- 类型:* PLL:带旁路 输入:时钟 输出:时钟 电路数:1 比率 - 输入:输出:1:10 差分 - 输入:输出:是/是 频率 - 最大:170MHz 除法器/乘法器:无/无 电源电压:2.375 V ~ 3.465 V 工作温度:0°C ~ 70°C 安装类型:* 封装/外壳:* 供应商设备封装:* 包装:* |
| LMX2354SLDX | 制造商:Rochester Electronics LLC 功能描述:- Bulk 制造商:Texas Instruments 功能描述: |
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