MAX2021 Datasheet, PDF (1/14 Pages) Maxim Integrated Products – High-Dynamic-Range, Direct Up-/Downconversion 750MHz to 1200MHz Quadrature Mod/Demod

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 OP_1dB
♦ -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 IP_1dB
♦ 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.
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