Maxim Integrated MAX2021
The 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. 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. In addition to offering excellent linearity and noise performance, the MAX2021 also yields a high level of component integration.
| Part No. |
MAX2021 |
| Datasheet |
MAX2021
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| Manufacturer |
 Maxim Integrated |
| Description |
High Dynamic Range Direct Up/Down Conversion Quadrature Mod/Demod |
| Buy |
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GENERAL DESCRIPTION
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. 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. 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 WC...
