Datasheet > LMX2485SQ/NOPB

LMX2485SQ/NOPB

更新时间： 2024-02-01 04:22:35

品牌	Logo	应用领域
德州仪器 - TI		通信射频个人通信
页数	文件大小	规格书
48页	1174K
描述
用于射频个人通信的 500MHz 至 3GHz Δ-Σ 低功耗双路 PLL \| RTW \| 24 \| -40 to 85

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

LMX2485SQ/NOPB 技术参数

是否Rohs认证：	符合	生命周期：	Transferred
包装说明：	HVQCCN, LCC24,.16SQ,20	Reach Compliance Code：	compliant
HTS代码：	8542.39.00.01	风险等级：	5.39
模拟集成电路 - 其他类型：	PLL FREQUENCY SYNTHESIZER	JESD-30 代码：	S-PQCC-N24
JESD-609代码：	e3	长度：	4 mm
湿度敏感等级：	3	功能数量：	1
端子数量：	24	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：	HVQCCN	封装等效代码：	LCC24,.16SQ,20
封装形状：	SQUARE	封装形式：	CHIP CARRIER, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：	260	电源：	3 V
认证状态：	Not Qualified	座面最大高度：	0.8 mm
子类别：	PLL or Frequency Synthesis Circuits	最大供电电压 (Vsup)：	3.6 V
最小供电电压 (Vsup)：	2.5 V	标称供电电压 (Vsup)：	3 V
表面贴装：	YES	技术：	CMOS
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.5 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	NOT SPECIFIED
宽度：	4 mm	Base Number Matches：	1

LMX2485SQ/NOPB 数据手册

Sample &

Buy

Support &

Community

Product

Folder

Tools &

Software

Technical

Documents

LMX2485, LMX2485E

SNAS236G –OCTOBER 2005–REVISED JANUARY 2016

LMX2485x 3-GHz Delta-Sigma Low-Power Dual PLLatinum™ Frequency Synthesizer

1 Features

3 Description

The LMX2485 device is

performance delta-sigma fractional-N PLL with an

auxiliary integer-N PLL. The device is fabricated

using Texas Instruments' advanced process.

low power, high

•

Quadruple Modulus Prescaler for Lower Divides

–

RF PLL: 8/9/12/13 or 16/17/20/21

IF PLL: 8/9 or 16/17

•

Advanced Delta-Sigma Fractional Compensation

With delta-sigma architecture, fractional spurs at

lower offset frequencies are pushed to higher

frequencies outside the loop bandwidth. The ability to

push close in spur and phase noise energy to higher

frequencies is a direct function of the modulator

order. Unlike analog compensation, the digital

feedback technique used in the LMX2485 is highly

resistant to changes in temperature and variations in

wafer processing. The LMX2485 delta-sigma

modulator is programmable up to fourth order, which

allows the designer to select the optimum modulator

order to fit the phase noise, spur, and lock time

requirements of the system.

–

12-Bit or 22-Bit Selectable Fractional Modulus

Up to 4th Order Programmable Delta-Sigma

Modulator

Features for Improved Lock Time

–

Fastlock / Cycle Slip Reduction With Integrated

Time-Out Counter Which Requires Only a

Single-Word Write

•

Wide Operating Range

–

LMX2485 RF PLL: 500 MHz to 3.0 GHz

LMX2485E RF PLL: 50 MHz to 3.0 GHz

Useful Features

Serial data for programming the LMX2485 is

transferred through a three-line, high-speed (20-MHz)

MICROWIRE interface. The LMX2485 offers fine

frequency resolution, low spurs, fast programming

speed, and a single-word write to change the

frequency. This makes it ideal for direct digital

modulation applications, where the N-counter is

directly modulated with information. The LMX2485 is

available in a 24-lead 4.0 × 4.0 × 0.8 mm WQFN

package.

–

Digital Lock Detect Output

Hardware and Software Power-Down Control

On-Chip Input Frequency Doubler.

RF Phase Detector Frequency up to 50 MHz

2.5 to 3.6 V Operation With I_CC= 5.0 mA

2 Applications

•

Cellular Phones and Base Stations

Direct Digital Modulation Applications

Satellite and Cable TV Tuners

WLAN Standards

Device Information⁽¹⁾

RF PLL Frequency IF PLL Frequency

PART NUMBER

LMX2485E

50 - 3000 MHz

500 - 3000 MHz

75 - 800 MHz

LMX2485

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Functional Block Diagram

ëddLC1

ëddLC2

LC b ꢂivider

. /ounꢀer

8ꢁ9

CinLC

ꢄbꢅ{/

ꢅ{/in

thase

/omp

/harge

tump

16ꢁ17

trescaler

/touꢀLC

! /ounꢀer

[ꢂ

LC w

ꢂivider

ꢅ{/ouꢀ

ëddwC1

Cꢀesꢀꢁ[ꢂ

ꢃÜó

Cꢀesꢀꢁ[ꢂ

wC w

ꢂivider

1X / 2X

ëddwC2

ëddwC3

ëddwC4

ëddwC5

CinwC

wC [ꢂ

wC b ꢂivider

/ /ounꢀer

8ꢁ9ꢁ12ꢁ13

16ꢁ17ꢁ20ꢁ21

trescaler

/harge

tump

thase

/omp

/touꢀwC

C[ouꢀwC

. /ounꢀer

wC b ꢂivider

FinRF*

! /ounꢀer

/ꢄ

wC Casꢀlock

/[Y

ꢃL/wꢅíLwꢄ

Lnꢀerface

ꢂ!Ç!

Dbꢂ

Compensation

[ꢄ

An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

12 3 4 5 6 7...48

下载PDF

与LMX2485SQ/NOPB相关器件

型号	品牌	描述	获取价格	数据表
LMX2485SQX	NSC	50 MHz - 3.0 GHz High Performance Delta-Sigma	获取价格
LMX2485SQX/NOPB	TI	用于射频个人通信的 500MHz 至 3GHz Δ-Σ 低功耗双路 PLL \| RTW \|	获取价格
LMX2486	NSC	1.0 GHz - 4.5 GHz High Performance Delta-Sigma Low Power Dual PLLatinum TM Frequency Synth	获取价格
LMX2486	TI	用于射频个人通信的 1GHz 至 4.5GHz Δ-Σ 低功耗双路 PLL	获取价格
LMX2486SQ	NSC	IC PLL FREQUENCY SYNTHESIZER, 4500 MHz, PQCC24, 4 X 4 MM, 0.8 MM HEIGHT, PLASTIC, LLP-24,	获取价格
LMX2486SQ/NOPB	TI	用于射频个人通信的 1GHz 至 4.5GHz Δ-Σ 低功耗双路 PLL \| RTW \|	获取价格

产品中心

服务支持

精选活动

关于我们

帮助中心

LMX2485SQ/NOPB

LMX2485SQ/NOPB 技术参数

LMX2485SQ/NOPB 数据手册

与LMX2485SQ/NOPB相关器件

与LMX2485SQ/NOPB相关文章

您还可以找

产品中心

服务支持

精选活动

关于我们

帮助中心

LMX2485SQ/NOPB

LMX2485SQ/NOPB 技术参数

LMX2485SQ/NOPB 数据手册

与LMX2485SQ/NOPB相关器件

与LMX2485SQ/NOPB相关文章

您还可以找

您在本页遇到什么问题？