WiMAX transceiver boosts SNR performance
Maxim Integrated Products
MAX2839
Improved performance maximises the data throughput and radio-link range of nomadic and mobile WiMAX subscriber applications.
Maxim Integrated Products reckons its MAX2839 is the industry's first single-chip 2.3 to 2.7GHz, WiMAX MIMO RF transceiver to enter high-volume production.
This device uses a dual-receiver architecture to mitigate RF channel fading, thereby increasing the signal-to-noise ratio (SNR) by as much as 10dB compared with a single-receiver architecture.
This improved performance maximises the data throughput and radio-link range of nomadic and mobile WiMAX subscriber applications in notebook computers, express/PC cards, smartphones and in-home desktop CPE modems.
Currently shipping in volume to customers worldwide, the MAX2839 is ideal for mobile WiMAX, Korean WiBro and other OFDM-based wireless broadband systems.
Designed using Maxim's in-house, high-performance SiGe BiCMOS process, the MAX2839 provides the industry's best receiver noise performance.
Both of the two receivers feature the industry's lowest noise figure at 2.3dB, -81dBm sensitivity for a 64-QAM signal at 5MHz channel bandwidth and a 95dB gain control range that is digitally controlled in 1dB steps.
Factory calibrated to achieve better than -35dB EVM, -45dBc of sideband suppression and carrier leakage of -40dBc without DC-offset correction, the receivers significantly simplify integration with the digital MAC/baseband IC.
On the transmitter, the MAX2839 features a 62dB gain control range, digitally controlled in 1dB steps.
It delivers a 0dBm linear output with a 64-QAM signal, greater than -45dBc of sideband suppression, and more than -36dB EVM, while meeting a -70dBr spectral mask.
The MAX2839 operates from a 2.7 to 3.6V supply.
A low-power shutdown mode reduces current consumption to 10uA to save power in system-sleep/standby mode.
This transceiver is available in a small, 8 x 8mm, leadless, 56-pin TQFN package.
Pricing starts at US $9.31 (1000-up).
An evaluation kit is available to speed designs.
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