Electronic Design
WiMax Transceiver Improves SNR

WiMax Transceiver Improves SNR

Debuting as the industry's first single-chip, a 2.3 GHz to 2.7 GHz WiMax MIMO RF transceiver in a 3.5 mm x 5.1 mm WLP, the MAX2839AS employs a dual-receiver architecture to mitigate RF channel fading by as much as 10 dB compared to a single-receiver architecture. Exploiting the company’s SiGe BiCMOS process, the device reportedly provides the industry's best receiver noise performance. Both receivers specify a noise figure at 2.3 dB, -81 dBm sensitivity for a 64-QAM signal at a 5-MHz channel bandwidth and a 95-dB gain control range that is digitally controllable in 1-dB steps. Each transceiver is factory calibrated to achieve better than -35 dB EVM, -45 dBc of sideband suppression, and carrier leakage of -40dBc. The transmitter sports a 62-dB gain control range, digitally controllable in 1-dB steps. It delivers a 0-dBm linear output with a 64-QAM signal, greater than -45 dBc of sideband suppression, and more than -36dB EVM, all while meeting a -70 dBr spectral mask. Operating from a 2.7V to 3.6V supply, the device’s shutdown mode reduces current consumption to 10 µA. Pricing for the MAX2839AS starts at $8.62 each/1,000. MAXIM INTEGRATED PRODUCTS, Sunnyvale, CA. (800) 998-8800.


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