SUNNYVALE, CA — Maxim Integrated Products has introduced the MAX2838, a single-chip WiMAX RF transceiver in high-volume production. This device eliminates the costly SAW filter and extra VCO circuitry required by existing superheterodyne solutions, thus saving 50 percent BOM cost, significant component count, and board space.
Ideal for low-cost, 802.16d/802.16e WiMAX CPE products operating in the 3.3-GHz to 3.9-GHz band, the MAX2838 enables affordable wireless broadband services in BRIC countries (Brazil, Russia, India, China), as well as in Western Europe, Australia, and Canada.
Whereas superheterodyne solutions require an external SAW filter for channel filtering, the MAX2838 saves space and BOM cost by integrating monolithic baseband filters for both the receiver and transmitter. An SPI-compatible interface enables electronic programming of channel filtering to support multiple channel bandwidths from 1.5 MHz to 28 MHz. This wide range of bandwidth support allows one radio BOM to support virtually all geographic markets where channel bandwidths differ according to each country's spectrum regulations.
Designed using Maxim's in-house, high-performance SiGe BiCMOS process, the IC claims to provide the industry's best receiver performance. It features a low 2.8-dB receiver noise figure, -11-dBm input IP3, and -39-dBc integrated VCO phase noise, while consuming only 288-mW of power. The receiver has a 94-dB gain-control range, digitally controlled in 2-dB steps. Receiver EVM is better than -35 dB, and sideband suppression is over 45 dB.
The MAX2838's transmitter features a 60-dB gain-control range, digitally controlled in 1-dB steps. It delivers a 0-dBm linear output with a 64-QAM signal, over 45-dB sideband suppression, and better than -36-dB EVM while meeting a -70-dBr spectral mask.
The high linearity of the transmitter output allows this transceiver to be used in WiMAX pico or femto base stations, subscriber CPE or PC cards, and USB dongle devices. Additionally, a unique master/slave mode allows two MAX2838 transceivers to operate in MIMO (multiple-input-multiple-output) or MRC (maximal-ratio-combining) configurations for improved system range and data throughput performance.
The MAX2838 operates from a +2.7-V to +3.6-V supply. It is available in a small, 6-mm x 6-mm, leadless, 48-pin TQFN package. An evaluation kit is available to speed designs.
A data sheet for the MAX2838 is available.
For further information visit www.maxim-ic.com.