The MAX2838 is a MAXIM company's direct-conversion, zero-IF, RF transceiver designed specifically for 3.3GHz to 3.9GHz wireless broadband systems.
The MAX2838 is a direct‑conversion, zero‑IF RF transceiver designed for 3.3 GHz to 3.9 GHz wireless broadband systems. It integrates the RF‑to‑baseband receive path, baseband‑to‑RF transmit path, VCO, frequency synthesizer, and a digital SPI interface in a compact 48‑pin thin QFN package (6 mm × 6 mm × 0.8 mm).
The device supports 2Tx/2Rx MIMO operation, on‑chip DC‑offset cancellation, I/Q error detection, and carrier‑leakage detection. Typical specifications include a supply voltage range of 2.7 V–3.6 V, a 60 dB Tx gain control range, a 2 µs Tx‑Rx switching time, and programmable channel filters covering 1.5 MHz to 28 MHz bandwidth.
| Supply voltage | 2.7 V to 3.6 V |
|---|---|
| Package | 48‑pin thin QFN (6 mm × 6 mm × 0.8 mm) |
| Tx‑Rx switching time | 2 µs |
| Tx gain control range | 60 dB (1 dB steps) |
| Rx noise figure | 2.8 dB |
| Channel bandwidth (programmable) | 1.5 MHz to 28 MHz |
The device operates from –40 °C to +85 °C.
In shutdown mode the supply current is typically 12 µA at 25 °C.
It supports programmable channel filters from 1.5 MHz up to 28 MHz.
The transceiver can switch from Tx to Rx in about 2 µs.