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MAX2021ETX

High-Dynamic-Range, Direct Up-/Downconversion 750MHz to 1200MHz Quadrature Mod/Demod

Maxim Integrated 

19-3918; Rev 0; 3/06

EVALUATION KIT AVAILABLE

High-Dynamic-Range, Direct Up-/Downconversion

750MHz to 1200MHz Quadrature Mod/Demod

General Description

The MAX2021 low-noise, high-linearity, direct upcon-

version/downconversion quadrature modulator/demod-

ulator is designed for RFID handheld and portal

readers, as well as single and multicarrier 750MHz to

1200MHz GSM/EDGE, cdma2000®, WCDMA, and

iDEN® base-station applications. Direct conversion

architectures are advantageous since they significantly

reduce transmitter or receiver cost, part count, and

power consumption as compared to traditional IF-based

double conversion systems.

In addition to offering excellent linearity and noise perfor-

mance, the MAX2021 also yields a high level of compo-

nent integration. This device includes two matched

passive mixers for modulating or demodulating in-phase

and quadrature signals, two LO mixer amplifier drivers,

and an LO quadrature splitter. On-chip baluns are also

integrated to allow for single-ended RF and LO connec-

tions. As an added feature, the baseband inputs have

been matched to allow for direct interfacing to the trans-

mit DAC, thereby eliminating the need for costly I/Q

buffer amplifiers.

The MAX2021 operates from a single +5V supply. It is

available in a compact 36-pin thin QFN package (6mm

x 6mm) with an exposed paddle. Electrical perfor-

mance is guaranteed over the extended -40°C to

+85°C temperature range.

Applications

RFID Handheld and Portal Readers

Single and Multicarrier WCDMA 850 Base Stations

Single and Multicarrier cdmaOne™ and cdma2000

Base Stations

GSM 850/GSM 900 EDGE Base Stations

Predistortion Transmitters and Receivers

WiMAX Transmitters and Receivers

Fixed Broadband Wireless Access

Military Systems

Microwave Links

Digital and Spread-Spectrum Communication

Systems

Video-on-Demand (VOD) and DOCSIS Compliant

Edge QAM Modulation

Cable Modem Termination Systems (CMTS)

cdma2000 is a registered trademark of Telecommunications

Industry Association.

iDEN is a registered trademark of Motorola, Inc.

cdmaOne is a trademark of CDMA Development Group.

Features

♦ 750MHz to 1200MHz RF Frequency Range

♦ Scalable Power: External Current-Setting

Resistors Provide Option for Operating Device in

Reduced-Power/Reduced-Performance Mode

♦ 36-Pin, 6mm x 6mm TQFN Provides High Isolation

in a Small Package

Modulator Operation:

♦ Meets 4-Carrier WCDMA 65dBc ACLR

♦ +21dBm Typical OIP3

♦ +58dBm Typical OIP2

♦ +16.7dBm Typical OP1dB

♦ -32dBm Typical LO Leakage

♦ 43.5dBc Typical Sideband Suppression

♦ -174dBm/Hz Output Noise Density

♦ DC to 300MHz Baseband Input Allows a Direct

Launch DAC Interface, Eliminating the Need for

Costly I/Q Buffer Amplifiers

♦ DC-Coupled Input Allows Ability for Customer

Offset Voltage Control

Demodulator Operation:

♦ +35.2dBm Typical IIP3

♦ +76dBm Typical IIP2

♦ > 30dBm IP1dB

♦ 9.2dB Typical Conversion Loss

♦ 9.3dB Typical NF

♦ 0.06dB Typical I/Q Gain Imbalance

♦ 0.15° I/Q Typical Phase Imbalance

Ordering Information

PART

TEMP RANGE PIN-PACKAGE PKG

CODE

MAX2021ETX

MAX2021ETX-T

-40°C to +85°C

-40°C to +85°C

36 Thin QFN-EP* T3666-2

(6mm x 6mm)

36 Thin QFN-EP*

(6mm x 6mm)

T3666-2

MAX2021ETX+

MAX2021ETX+T

-40°C to +85°C

-40°C to +85°C

36 Thin QFN-EP* T3666-2

(6mm x 6mm)

36 Thin QFN-EP*

(6mm x 6mm)

T3666-2

*EP = Exposed paddle. + = Lead free.

-T = Tape-and-reel package.

________________________________________________________________ Maxim Integrated Products 1

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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