Rainbow-electronics MAX2338 User Manual download pdf

General Description

The MAX2338 receiver RF front-end IC is designed for

dual-band CDMA cellular phones and can also be used

in dual-band TDMA, GSM, or EDGE cellular phones.

Thanks to the MAX2338’s on-chip low-power LO

divider, the cellular VCO module can be eliminated.

The MAX2338 includes a low-noise amplifier (LNA) with

an adjustable high-input third-order intercept point

(IIP3) to minimize intermodulation and cross-modulation

in the presence of large interfering signals. For cellular

band operation, a low-gain LNA is available for higher

cascaded IIP3 at lower current.

The CDMA mixers are designed for high linearity, low

noise, and differential IF outputs. The FM mixer is

designed for lower current and single-ended output.

The MAX2338 triple-mode LNA/mixer includes an on-

chip LO frequency divider to allow the use of a single

VCO for both bands. This device is available in an ultra-

small 28-pin leadless QFN package.

________________________Applications

Dual-Band, Triple-Mode PCS/Cellular Phones

Dual-Mode Cellular Phones

Features

♦ 1.4dB LNA Noise Figure

♦ 15dB LNA Gain

♦ Mixer Noise Figure

7.5dB (CDMA)

8.7dB (AMPS)

♦ Mixer Gain

14.5dB PCS

13.3dB Cellular

8.8dB AMPS

♦ LO Frequency Divider, Saves VCO Module

♦ LO Output Buffers for TX

♦ Ultra-Small 28-Pin Leadless Package

MAX2338

Triple/Dual-Mode CDMA LNA/Mixers

________________________________________________________________ Maxim Integrated Products 1

MAX2338

2526

28 22

2324

10 11 12 13 14

N.C.

GND

LO/2

LOIN

GND

PLOOUT

CLOOUT

CMIXIN

CLNAOUT

GND

PLNAOUT

GND

PMIXIN

GND

CLNAIN

LIN

GAIN

PLNAIN

RLNA

IF-

GND

BUFFEN

FMOUT

IF+

RBIAS

QFN

TOP VIEW

÷2

BAND

19-1807; Rev 1; 3/01

EVALUATION KIT

AVAILABLE

Ordering Information

28 QFN

PIN-PACKAGETEMP RANGE

-40°C to +85°CMAX2338EGI

PART

Pin Configuration/

Functional Diagram

Typical Operating Circuit appears at end of data sheet.

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.

1 2 3 4 5 6 ... 12 13

Summary of Contents

Page 1 - TOP VIEW

General DescriptionThe MAX2338 receiver RF front-end IC is designed fordual-band CDMA cellular phones and can also be usedin dual-band TDMA, GSM, or E

Page 2 - DC ELECTRICAL CHARACTERISTICS

MAX2338Triple/Dual-Mode CDMA LNA/Mixers10 ______________________________________________________________________________________Operational ModesThe v

Page 3 - AC ELECTRICAL CHARACTERISTICS

MAX2338Triple/Dual-Mode CDMA LNA/Mixers______________________________________________________________________________________ 11Layout ConsiderationsK

Page 4

MAX2338Triple/Dual-Mode CDMA LNA/Mixers12 ______________________________________________________________________________________Table 5. MAX2338 PCS B

Page 5

MAX2338Triple/Dual-Mode CDMA LNA/Mixers811 14N.C.16171821GAINLINBUFFEN13567CELLULARPCSCELLPCSCDMAVCCVCCVCC24kΩFMPCS LO LO_OUTLO/2BAND20ΩMAX2338÷228272

Page 6

MAX2338Triple/Dual-Mode CDMA LNA/Mixers2 _______________________________________________________________________________________ABSOLUTE MAXIMUM RATIN

Page 7

MAX2338Triple/Dual-Mode CDMA LNA/Mixers_______________________________________________________________________________________ 3AC ELECTRICAL CHARACTE

Page 8 - Pin Description

MAX2338Triple/Dual-Mode CDMA LNA/Mixers4 _______________________________________________________________________________________PARAMETER CONDITIONSMI

Page 9 - Detailed Description

_______________________________________________________________________________________ 5MAX2338Triple/Dual-Mode CDMA LNA/MixersTypical Operating Char

Page 10 - Applications Information

MAX2338Triple/Dual-Mode CDMA LNA/Mixers6 _______________________________________________________________________________________Typical Operating Char

Page 11 - Layout Considerations

_______________________________________________________________________________________ 7MAX2338Triple/Dual-Mode CDMA LNA/MixersTypical Operating Char

Page 12 -

MAX2338Triple/Dual-Mode CDMA LNA/Mixers8 _______________________________________________________________________________________Pin DescriptionPIN NAM

Page 13 - Package Information

MAX2338Triple/Dual-Mode CDMA LNA/Mixers_______________________________________________________________________________________ 9Detailed DescriptionTh

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Rainbow-electronics MAX2338 User Manual

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Summary of Contents

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