The MAX2022 low-noise, high-linearity, direct upconversion quadrature modulator is designed for single and multicarrier 1800MHz to 2200MHz UMTS/WCDMA, cdma2000, and DCS/PCS base-station applications. Direct upconversion architectures are advantageous since they significantly reduce transmitter cost, part count, and power consumption as compared to traditional IF-based double upconversion systems. In addition to offering excellent linearity and noise performance, the MAX2022 also yields a high level of component integration. This device includes two matched passive mixers for modulating in-phase and quadrature signals, three 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 MAX2022 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.
The MAX2022 is a low‑noise, high‑linearity direct upconversion quadrature modulator covering 1500 MHz to 2500 MHz. It integrates passive mixers, LO drivers, a quadrature splitter, and on‑chip baluns, allowing direct baseband‑to‑RF conversion from a single +5 V supply. The device targets single‑ and multicarrier base‑station applications such as UMTS/WCDMA, CDMA2000, DCS/PCS, and other wireless systems.
The datasheet details absolute maximum ratings, DC and AC electrical characteristics, typical operating curves, pin configuration, and component listings. It also includes ordering information for various thin‑QFN package options and performance graphs for output power, ACLR, LO leakage, sideband suppression, and noise density.
| RF Frequency Range | 1500 MHz to 2500 MHz |
|---|---|
| Supply Voltage (VCC) | 4.75 V to 5.25 V |
| Typical OIP3 | +23.3 dBm |
| Typical OIP2 | +51.5 dBm |
| Sideband Suppression | 45.7 dB |
| LO Leakage | -40 dBm (typ) |
| Output Noise Density | -173.2 dBm/Hz (typ) |
The MAX2022 operates from 1500 MHz to 2500 MHz.
It requires a supply voltage between 4.75 V and 5.25 V.
The typical OIP3 is +23.3 dBm.