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 ImbalanceApplication·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
·SystemsDescriptionThe MAX2021 low-noise, high-linearity, direct upconversion/ downconversion quadrature modulator/demodulator 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 performance, the MAX2021 also yields a high level of component 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 connections. As an added feature, the baseband inputs have been matched to allow for direct interfacing to the transmit 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 performance is guaranteed over the extended -40°C to +85°C temperature range.
MAX2021 Data Sheet
