MAX2538ETI+T【PDF 1/27 页】IC LNA/MIXER CELL/PCS/GPS 28TQFN

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Sheet目录473

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19-2487; Rev 3; 1/04

Quadruple-Mode PCS/Cellular/GPS LNA/Mixers

General Description

The MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/

MAX2531/MAX2537/MAX2538 family of single- and multi-

band LNA/mixer ICs is optimized for CDMA, GSM, and

TDMA applications in both cellular and PCS bands. In

addition, the MAX2530/MAX2531/MAX2537/MAX2538 ICs

feature a GPS LNA/mixer signal path for E911 and traveler

assistance applications. The cellular and PCS signals can

be routed to either IF port. For example, one IF port can be

connected to an IF filter with 30kHz bandwidth, while the

other port can drive an IF filter with a wider bandwidth. The

GPS band has its own IF port.

To optimize dynamic range at minimum current, the

MAX2351/MAX2354/MAX2358/MAX2359/MAX2530/

MAX2531/MAX2537/MAX2538 implement multiple LNA

and mixer states, including high gain/high linearity, high

Features

? Eliminate Up to 35 External Components

? Low LNA Noise Figure

PCS: 1.2dB

Cellular: 0.9dB

GPS: 1.0dB

? No External GPS VCO Required

? No Interstage GPS SAW Filter Required

? Triple Band, Quadruple Mode

? Ultra-Low Current: <10mA Average in CDMA

Phones

? Small 28-Pin QFN Package (5mm ? 5mm)

Ordering Information

gain/low linearity, midgain, low gain, and ultra-low gain. In

high-gain/high-linearity mode, the high-IP3 LNA mini-

mizes desensitization in the presence of a large interfer-

ing signal. For the other gain states, the LNA current is

reduced to improve standby time. Each band is imple-

mented with a separate mixer to optimize performance for

the specific band, and each mixer provides multiple lin-

PART

MAX2351 ETI

MAX2354 ETI

MAX2358 ETI

MAX2359 ETI

MAX2530 ETI

TEMP RANGE

-40 ° C to +85 ° C

PIN-PACKAGE

28 Thin QFN-EP*

earity modes to optimize linearity and current consump-

tion. The ultra-low gain mode operates with very little

current, which results in significant power savings

because the handset typically spends most of its time in

this mode.

Applications

MAX2531 ETI -40 ° C to +85 ° C

MAX2537 ETI -40 ° C to +85 ° C

MAX2538 ETI -40 ° C to +85 ° C

* EP = exposed pad.

28 Thin QFN-EP*

Triple-Band, Quadruple-Mode PCS/Cellular Handsets

Single-Band Handsets

E911 and Traveler Assistance Through GPS

Pin Configurations

GSM/TDMA Cellular Phones

PART

CELL PCS GPS

Selector Guide

CELL VCO

PCS VCO

CLNA_OUT

PLNA_IN

GIF-

GIF+

MAX2351

—

Input

Internal doubler

GND

IFO-

MAX2354

MAX2358

MAX2359

—

Input

Internal divider

—

Input

CLNA_IN

SHDN

MAX2538

IFO+

V CC

MAX2530

MAX2531

MAX2537

—

Input

Internal divider

Input

Internal doubler

Input

GLNA_IN

÷ 1.5

÷ 2

LO_OUT

BUFFEN

MAX2538

Internal divider

Input

Pin Configurations continued at end of data sheet.

________________________________________________________________ Maxim Integrated Products

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at

1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.

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