Datasheet > LMX2502

LMX2502

更新时间： 2023-09-03 20:33:54

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德州仪器 - TI		/
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描述
具有集成 VCO 的频率合成器系统

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LMX2502 数据手册

LMX2502, LMX2512

www.ti.com

SNWS010C –MARCH 2003–REVISED APRIL 2013

LMX2502/LMX2512 PLLatinum™ Frequency Synthesizer System with Integrated VCO

Check for Samples: LMX2502, LMX2512

FEATURES

DESCRIPTION

LMX2502 and LMX2512 are highly integrated, high

performance, low power frequency synthesizer

systems optimized for Korean PCS and Korean

Cellular CDMA (1xRTT, IS-95) mobile handsets.

•

Small Size

5.0 mm X 5.0 mm X 0.75 mm 28-Pin WQFN

Package

RF Synthesizer System

–

•

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.

–

Integrated RF VCO

Integrated Loop Filter

Low Spurious, Low Phase Noise Fractional-

N RF PLL Based on 11-Bit Delta Sigma

Modulator

LMX2502 and LMX2512 include a voltage controlled

oscillator (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 Cellular band.

–

10 kHz Frequency Resolution

•

IF Synthesizer System

–

Integer-N IF PLL

Programmable Charge Pump Current

Levels

LMX2502 and LMX2512 include an Integer-N IF PLL

also. For more flexible loop filter designs, the IF PLL

–

Programmable Frequency

includes

a 4-level programmable charge pump.

Supports Various Reference Frequencies

19.20/19.68 MHz

Together with an external VCO and loop filter,

LMX2502 and LMX2512 make a complete closed

loop IF synthesizer system.

–

•

Fast Lock Time: 500 µs

Serial data is transferred to the device via a three-

wire MICROWIRE interface (DATA, LE, CLK).

Low Current Consumption

–

17 mA at 2.8 V

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.

•

2.7 V to 3.3 V Operation

Digital Filtered Lock Detect Output

Hardware and Software Power Down Control

LMX2502 and LMX2512 are available in a 28-pin

WQFN package.

APPLICATIONS

•

Korean PCS CDMA Systems

Korean Cellular CDMA Systems

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.

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