The MAX2839 is a direct conversion, zero-IF, 2GHz 802.16e MIMO mobile WiMAX system RF transceiver with >40dB isolation, which integrates all circuitry required to implement the RF transceiver function, providing RF to baseband receive path, and base- band to RF transmit path, VCO, frequency synthesizer, crystal oscillator, and baseband/control interface.
The MAX2839 is a direct‑conversion, zero‑IF RF transceiver designed for 2 GHz 802.16e MIMO mobile WiMAX systems. It integrates a transmitter, two receivers, a VCO, sigma‑delta fractional‑N PLL, crystal oscillator and baseband/control interfaces, requiring only a few external components for a complete broadband solution.
Key features include >40 dB isolation between receivers, programmable on‑chip filters, fast 2 µs Tx‑Rx switching, low‑noise VCO, and a 56‑pin TQFN package (8 mm × 8 mm × 0.8 mm). The device supports up to 2048‑FFT OFDM, programmable channel filters (3.5 MHz‑20 MHz) and provides extensive digital control via a 4‑wire SPI interface.
| Operating Frequency Range | 2.3 GHz – 2.7 GHz |
|---|---|
| Package | 56‑pin TQFN (8 mm × 8 mm × 0.8 mm) |
| Supply Voltage | 2.7 V – 3.6 V |
| Tx‑Rx Switching Time | 2 µs |
| Rx Noise Figure | 2.3 dB per receiver |
| Tx Gain Control Range | 62 dB (1 dB steps) |
The MAX2839 operates from 2.3 GHz to 2.7 GHz.
It is supplied in a 56‑pin TQFN package measuring 8 mm × 8 mm × 0.8 mm.
The device operates with a supply voltage between 2.7 V and 3.6 V.
Each receiver has a noise figure of 2.3 dB.