Datasheet > LMX2541SQ3320E

LMX2541SQ3320E

更新时间： 2024-11-21 05:42:27

品牌	Logo	应用领域
美国国家半导体 - NSC		半导体信息通信管理
页数	文件大小	规格书
40页	923K
描述
Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO

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中文翻译

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LMX2541SQ3320E 数据手册

PRELIMINARY

July 2, 2009

LMX2541

Ultra-Low Noise PLLatinum Frequency Synthesizer with

Integrated VCO

General Description

Features

The LMX2541 is an ultra low noise frequency synthesizer

which integrates a high performance delta-sigma fractional N

PLL, a VCO with fully integrated tank circuit, and an optional

frequency divider. The PLL offers an unprecedented normal-

ized noise floor of -225 dBc/Hz and can be operated with up

to 104 MHz of phase-detector rate (comparison frequency) in

both integer and fractional modes. The PLL can also be con-

figured to work with an external VCO.

Very Low RMS Noise and Spurs

■

-225 dBc/Hz Normalized PLL Phase Noise

Integrated RMS Noise (100 Hz - 20 MHz)

—

2 mrad (100 Hz - 20 MHz) at 2.1 GHz

■

3.5 mrad (100 Hz - 20 MHz) at 3.5 GHz

Ultra Low-Noise Integrated VCO

■

External VCO Option (Internal VCO Bypassed)

VCO Frequency Divider 1 to 63 (all values)

Programmable Output Power

The LMX2541 integrates several low-noise, high precision

LDOs and output driver matching network to provide higher

supply noise immunity and more consistent performance,

while reducing the number of external components. When

combined with a high quality reference oscillator, the

LMX2541 generates a very stable, ultra low noise signal.

Up to 104 MHz Phase Detector Frequency

Integrated Low-Noise LDOs

Programmable Charge Pump Output

Partially Integrated Loop Filter

The LMX2541 is offered in a family of 6 devices with varying

VCO frequency range from 1990 MHz up to 4 GHz. Using a

flexible divider, the LMX2541 can generate frequencies as

low as 31.6 MHz. The LMX2541 is a monolithic integrated

circuit, fabricated in a proprietary BiCMOS process. Device

programming is facilitated using a three-wire MICROWIRE

interface that can operate down to 1.8 volts. Supply voltage

ranges from 3.15 to 3.45 volts. The LMX2541 is available in

a 36 pin 6x6x0.8 mm Lead-Free Leadless Leadframe Pack-

age (LLP).

Digital Frequency Shift Keying (FSK) Modulation Pin

Integrated Reference Crystal Oscillator Circuit

Hardware and Software Power Down

FastLock Mode with Cycle Slip Reduction

Analog and Digital Lock Detect

1.6 V Logic Compatibility

Target Applications

Device

VCO Frequency

1990 - 2240

2200 - 2530

2490 - 2865

2810 - 3230

3130 - 3600

3480 - 4000

Wireless Infrastructure (UMTS, LTE, WiMax)

■

LMX2541SQ2060E

LMX2541SQ2380E

LMX2541SQ2690E

LMX2541SQ3030E

LMX2541SQ3320E

LMX2541SQ3740E

Broadband Wireless

Wireless Meter Reading

Test and Measurement

System Diagram

30073322

300733

www.national.com

12 3 4 5 6 7...40

中文翻译

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与LMX2541SQ3320E相关器件

型号	品牌	获取价格	描述	数据表
LMX2541SQ3320E/NOPB	TI	获取价格	Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO 36-WQFN -40 to 85
LMX2541SQ3740E	TI	获取价格	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX2541SQ3740E	NSC	获取价格	Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX2541SQ3740E/NOPB	TI	获取价格	Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO 36-WQFN -40 to 85
LMX2541SQE2060E	TI	获取价格	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX2541SQE2060E/NOPB	TI	获取价格	Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO 36-WQFN -40 to 85
LMX2541SQE2380E	TI	获取价格	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX2541SQE2380E/NOPB	TI	获取价格	具有集成 VCO 的超低噪声 PLLatinum 频率合成器 \| NJK \| 36 \| -
LMX2541SQE2690E	TI	获取价格	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
LMX2541SQE2690E/NOPB	TI	获取价格	具有集成 VCO 的超低噪声 PLLatinum 频率合成器 \| NJK \| 36 \| -

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