Datasheet > LMX2470SLEX

LMX2470SLEX

更新时间： 2024-09-25 11:11:43

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
40页	1670K
描述
具有 800MHz 整数 N PLL 的 2.6GHz Δ-Σ 分数 N PLL \| NPF \| 24 \| -40 to 85

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LMX2470SLEX 数据手册

LMX2470

www.ti.com

SNAS195B –MARCH 2003–REVISED MARCH 2013

LMX2470 2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL

Check for Samples: LMX2470

FEATURES

DESCRIPTION

The LMX2470 is a low power, high performance

delta-sigma fractional-N PLL with an auxiliary integer-

N PLL. The device is fabricated using TI’s advanced

BiCMOS process.

•

Low In-Band Phase Noise and Low Fractional

Spurs

•

12 Bit or 22 Bit Selectable Fractional Modulus

Up to 4th Order Programmable Delta-Sigma

Modulator

With delta-sigma architecture, fractional spur

compensation is achieved with noise shaping

capability of the delta-sigma modulator and the

inherent low pass filtering of the PLL loop filter.

Fractional spurs at lower frequencies are pushed to

higher frequencies outside the loop bandwidth. Unlike

analog compensation, the digital feedback techniques

used in the LMX2470 are highly resistant to changes

in temperature and variations in wafer processing.

With delta-sigma architecture, the ability to push

close in spur and phase noise energy to higher

frequencies is a direct function of the modulator

order. The higher the order, the more this energy can

be spread to higher frequencies. The LMX2470 has a

programmable modulator up to order four, which

allows the designer to select the optimum modulator

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

requirements of the system.

•

Enhanced Anti-Cycle Slip Fastlock Circuitry

–

Fastlock

Cycle Slip Reduction

Integrated Timeout Counters

•

Digital Lock Detect Output

Prescalers Allow Wide Range of N Values

–

RF PLL: 16/17/20/21

IF PLL: 8/9 or 16/17

•

Crystal Reference Frequency up to 110 MHz

On-chip Crystal Reference Frequency Doubler.

Phase Comparison Frequency up to 30 MHz

Hardware and Software Power-down Control

Ultra Low Consumption: I_CC= 4.1 mA (Typical)

Programming is fast and simple. Serial data is

transferred into the LMX2470 via

a three line

APPLICATIONS

MICROWIRE interface (Data, Clock, Load Enable).

Nominal supply voltage is 2.5 V. The LMX2470

features a typical current consumption of 4.1 mA at

2.5 V. The LMX2470 is available in a 24 lead 3.5 X

4.5 X 0.6 mm package.

•

Cellular Phones and Base Stations

–

CDMA, WCDMA, GSM/GPRS, TDMA, EDGE,

PDC

Applications Requiring Fine Frequency

Resolution

•

Satellite and Cable TV Tuners

WLAN Standards

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

All trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...40

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LMX2470SLEX 替代型号

型号	品牌	替代类型	描述	数据表
LMX2470SLEX/NOPB	TI	完全替代	具有 800MHz 整数 N PLL 的 2.6GHz Δ-Σ 分数 N PLL \| NP
LMX2470SLEX/NOPB	NSC	功能相似	IC PLL FREQUENCY SYNTHESIZER, 2600 MHz, PQCC24, LEAD FREE, CSP-24, PLL or Frequency Synthe
LMX2470SLEX	NSC	功能相似	2.6 GHz Delta-Sigma Fractional-N PLL with 800 MHz Integer-N PLL

与LMX2470SLEX相关器件

型号	品牌	获取价格	描述	数据表
LMX2470SLEX/NOPB	NSC	获取价格	IC PLL FREQUENCY SYNTHESIZER, 2600 MHz, PQCC24, LEAD FREE, CSP-24, PLL or Frequency Synthe
LMX2470SLEX/NOPB	TI	获取价格	具有 800MHz 整数 N PLL 的 2.6GHz Δ-Σ 分数 N PLL \| NP
LMX2471	NSC	获取价格	3.6 GHz Delta-Sigma Fractional-N PLL with 1.7 GHz Integer-N PLL
LMX2471SLEX	NSC	获取价格	IC PLL FREQUENCY SYNTHESIZER, 3600 MHz, QCC24, 3.5 X 4.5 MM, 0.60 MM HEIGHT, TCSP-24, PLL
LMX2471SLEX	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 3600MHz, QCC24, 3.5 X 4.5 MM, 0.60 MM HEIGHT, TCSP-24
LMX2471SLEX/NOPB	NSC	获取价格	IC,PHASE-LOCKED LOOP,BICMOS,LLCC,24PIN,PLASTIC
LMX2485	NSC	获取价格	50 MHz - 3.0 GHz High Performance Delta-Sigma
LMX2485	TI	获取价格	用于射频个人通信的 500MHz 至 3GHz Δ-Σ 低功耗双路 PLL
LMX2485_0610	NSC	获取价格	50 MHz - 3.0 GHz High Performance Delta-Sigma
LMX2485_08	NSC	获取价格	50 MHz - 3.0 GHz High Performance Delta-Sigma

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