Datasheet > LMX2372MDC

LMX2372MDC

更新时间： 2024-01-27 17:51:43

品牌	Logo	应用领域
德州仪器 - TI		信息通信管理
页数	文件大小	规格书
27页	550K
描述
PLL FREQUENCY SYNTHESIZER, 1200MHz, UUC, DIE

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LMX2372MDC 技术参数

生命周期：	Obsolete	包装说明：	DIE, DIE OR CHIP
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.84	模拟集成电路 - 其他类型：	PLL FREQUENCY SYNTHESIZER
JESD-30 代码：	X-XUUC-N	功能数量：	1
最高工作温度：	85 °C	最低工作温度：	-40 °C
封装主体材料：	UNSPECIFIED	封装代码：	DIE
封装等效代码：	DIE OR CHIP	封装形状：	UNSPECIFIED
封装形式：	UNCASED CHIP	电源：	3/5 V
认证状态：	Not Qualified	子类别：	PLL or Frequency Synthesis Circuits
最大供电电流 (Isup)：	6 mA	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：	NO LEAD
端子位置：	UPPER	Base Number Matches：	1

LMX2372MDC 数据手册

July 2000

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 frequency

synthesizers, including prescalers, is designed to be used as

a first and second local oscillator for dual mode or dual con-

version transceivers. It is fabricated using National’s 0.5u

ABiCV silicon BiCMOS process. The LMX237x contains 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 frequencies below

1.2 GHz. A 16/17 or an 8/9 prescaler can be selected for the

1.2 GHz RF synthesizers with the 8/9 prescaler rated for in-

put 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 voltage

controlled oscillators (VCOs). Serial data is transferred into

the LMX237x via a 1.8 V three wire interface (Data, Enable,

Clock) compatible with low voltage baseband processors.

Supply voltage can range from 2.7V to 5.5V. The LMX237x

family features very low current consumption typically:

LMX2370 - 6.0 mA at 3V, LMX2371 - 5.0 mA at 3V, LMX2372

- 4.0 mA at 3V.

™

n Low voltage MICROWIRE interface (1.8V up to V_CC

)

n Low prescaler values

32/33 at f_IN≤ 2.5 GHz

16/17 at f_IN≤ 1.2 GHz

8/9 at f_IN≤ 550 MHz

n Selectable charge pump current levels

™

n Selectable FastLock mode

n Enhanced ESD protection

n Available in 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)

Functional Block Diagram

DS101026-4

™

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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