Datasheet > 信号电路 > 锁相环或频率合成电路> LMX2371TM

LMX2371TM

更新时间： 2024-01-12 06:24:57

品牌	Logo	应用领域
美国国家半导体 - NSC		信号电路锁相环或频率合成电路射频光电二极管个人通信信息通信管理
页数	文件大小	规格书
16页	220K
描述
PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications

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数据手册

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LMX2371TM 技术参数

生命周期：	Active	包装说明：	TSSOP,
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.72	模拟集成电路 - 其他类型：	PLL FREQUENCY SYNTHESIZER
JESD-30 代码：	R-PDSO-G20	长度：	6.5 mm
功能数量：	1	端子数量：	20
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
座面最大高度：	1.2 mm	最大供电电压 (Vsup)：	5.5 V
最小供电电压 (Vsup)：	2.7 V	标称供电电压 (Vsup)：	3 V
表面贴装：	YES	技术：	BICMOS
温度等级：	INDUSTRIAL	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
宽度：	4.4 mm	Base Number Matches：	1

LMX2371TM 数据手册

PRELIMINARY

March 1999

LMX2370/LMX2371/LMX2372

™

PLLatinum Dual Frequency Synthesizer for RF

Personal Communications

LMX2370 2.5 GHz/1.2 GHz

LMX2371 2.0 GHz/1.2 GHz

LMX2372 1.2 GHz/1.2 GHz

The LMX237X are available in a 24-pad chip scale (CSP) or

a 20-pin TSSOP surface mount plastic package.

Features

n 2.7V–5.5V operation

n Ultra low current consumption

n Low phase detector noise floor

General Description

The LMX237X family of monolithic, integrated dual fre-

quency synthesizers, including prescalers, is designed to be

used as a first and second local oscillator for dual mode or

dual conversion transceivers. It is fabricated using National’s

0.5u ABiCV silicon BiCMOS process. The LMX237X con-

tains two dual modulus prescalers. A 32/33 or a 16/17

prescaler can be selected for the 2.5 GHz and 2.0 GHz RF

synthesizers with the 16/17 prescaler rated for input frequen-

cies below 1.2 GHz. A 16/17 or an 8/9 prescaler can be se-

lected for the 1.2 GHz RF synthesizers with the 8/9 prescaler

rated for input frequencies below 550 MHz. Using a digital

phase locked loop technique, the LMX237X can generate

very stable, low noise control signals for UHF and VHF volt-

age controlled oscillators (VCO’s). Serial data is transferred

into the LMX237X via a 1.8V three wire interface (Data, En-

able, Clock) compatible with low voltage baseband proces-

sors. Supply voltage can range from 2.7V to 5.5V. The

LMX237X family features very low current consumption typi-

™

n Low voltage MICROWIRE interface (1.8V up to V_CC

)

n Low prescaler values

32/33 f_IN≤ 2.5 GHz

16/17 f_IN≤ 1.2 GHz

8/9 f_IN≤ 550 MHz

n Selectable charge pump current levels

™

n Selectable FastLock mode

n Enhanced ESD protection

n Small 24 pad chip scale package (3.5 x 4.5 x 1.0 mm)

Applications

n Portable wireless communications (PCS/PCN, cordless)

n Dual mode cellular telephone systems

n Spread spectrum communication systems (CDMA)

n Cable TV tuners (CATV)

3V,

cally: LMX2370 - 6.0 mA

3V, LMX2371 - 5.0 mA

LMX2372 - 4.0 mA 3V.

Functional Block Diagram

DS101026-1

™

FastLock , PLLatinum and MICROWIRE are trademarks of National Semiconductor Corporation.

TRI-STATE^®is a registered trademark of National Semiconductor Corporation.

DS101026

www.national.com

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与LMX2371TM相关器件

型号	品牌	描述	获取价格	数据表
LMX2371TMX	NSC	PLLatinum⑩ Dual Frequency Synthesizer for RF	获取价格
LMX2372	NSC	PLLatinum⑩ Dual Frequency Synthesizer for RF	获取价格
LMX2372MDC	TI	PLL FREQUENCY SYNTHESIZER, 1200MHz, UUC, DIE	获取价格
LMX2372SLBX	NSC	PLLatinum⑩ Dual Frequency Synthesizer for RF	获取价格
LMX2372TM	NSC	PLLatinum⑩ Dual Frequency Synthesizer for RF	获取价格
LMX2372TMX	NSC	PLLatinum⑩ Dual Frequency Synthesizer for RF	获取价格

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