LMX2502 datasheet(1/18 Pages) NSC

tên linh kiện	LMX2502

Giải thích chi tiết về linh kiện	PLLatinum??Frequency Synthesizer System with Integrated VCO

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LMX2502/LMX2512

PLLatinum™ Frequency Synthesizer System with

Integrated VCO

General Description

LMX2502 and LMX2512 are highly integrated, high perfor-

mance, low power frequency synthesizer systems optimized

for Korean PCS and Korean Cellular CDMA (1xRTT, IS-95)

mobile handsets. Using a proprietary digital phase locked

loop technique, LMX2502 and LMX2512 generate very

stable, low noise local oscillator signals for up and down

conversion in wireless communications devices.

LMX2502 and LMX2512 include a voltage controlled oscil-

lator (VCO), a loop filter, and a fractional-N RF PLL based on

a delta sigma modulator. In concert these blocks form a

closed loop RF synthesizer system. LMX2502 supports the

Korean PCS band and LMX2512 supports the Korean Cel-

lular band.

LMX2502 and LMX2512 include an Integer-N IF PLL also.

For more flexible loop filter designs, the IF PLL includes a

4-level programmable charge pump. Together with an exter-

nal VCO and loop filter, LMX2502 and LMX2512 make a

complete closed loop IF synthesizer system.

Serial data is transferred to the device via a three-wire

MICROWIRE interface (DATA, LE, CLK).

Operating supply voltage ranges from 2.7 V to 3.3 V.

LMX2502 and LMX2512 feature low current consumption:

17 mA at 2.8 V.

LMX2502 and LMX2512 are available in a 28-pin leadless

leadframe package (LLP).

Features

n

Small Size

5.0 mm X 5.0 mm X 0.75 mm 28-Pin LLP Package

n

RF Synthesizer System

Integrated RF VCO

Integrated Loop Filter

Low Spurious, Low Phase Noise Fractional-N RF PLL

Based on 11-Bit Delta Sigma Modulator

10 kHz Frequency Resolution

n

IF Synthesizer System

Integer-N IF PLL

Programmable Charge Pump Current Levels

Programmable Frequency

n

Supports Various Reference Frequencies

19.20/19.68 MHz

n

Fast Lock Time: 500 µs

n

Low Current Consumption

17 mA at 2.8 V

n

2.7 V to 3.3 V Operation

n

Digital Filtered Lock Detect Output

n

Hardware and Software Power Down Control

Applications

n

Korean PCS CDMA Systems

n

Korean Cellular CDMA Systems

Functional Block Diagram

20068001

PLLatinum™ is a trademark of National Semiconductor Corporation.

June 2003

DS200680

www.national.com

Số phần tương tự - LMX2502

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	LMX2502	842Kb / 24P	LMX2502/LMX2512 PLLatinum??Frequency Synthesizer System with Integrated VCO
	LMX2502	393Kb / 23P	LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO REVISED APRIL 2013
	LMX2502LQ1635/NOPB	842Kb / 24P	LMX2502/LMX2512 PLLatinum??Frequency Synthesizer System with Integrated VCO
	LMX2502LQ1635/NOPB	393Kb / 23P	LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO REVISED APRIL 2013
	LMX2502LQ1635/NOPB.B	393Kb / 23P	LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO REVISED APRIL 2013

More results

Mô tả tương tự - LMX2502

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LMX2522	189Kb / 18P	PLLatinum Frequency Synthesizer System with Integrated VCOs
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Texas Instruments	LMX2541SQ2060E_NOPB	1Mb / 64P	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
	LMX2541SQE2060E	1Mb / 64P	LMX2541 Ultra-Low Noise PLLatinum Frequency Synthesizer with Integrated VCO
	LMX2502	842Kb / 24P	LMX2502/LMX2512 PLLatinum??Frequency Synthesizer System with Integrated VCO
	LMX2522	853Kb / 26P	LMX2522/LMX2532 PLLatinum??Frequency Synthesizer System with Integrated VCOs

More results

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