General Description
The MAX2837 direct-conversion zero-IF RF transceiver is designed specifically for 2.3GHz to 2.7GHz wireless broadband systems. The MAX2837 completely integrates all circuitry required to implement the RF transceiver function, providing RF-to-baseband receive path; and baseband-to-RF transmit path, VCO, frequency synthesizer, crystal oscillator, and baseband/control interface.

Features
● 2.3GHz to 2.7GHz Wideband Operation
● Complete RF Transceiver, PA Driver, and Crystal Oscillator
    • 0dBm Linear OFDM Transmit Power
    • -70dBr Tx Spectral Emission Mask
    • 2.3dB Rx Noise Figure
    • Tx/Rx I/Q Error and LO Leakage Detection
    • Monolithic Low-Noise VCO with -39dBc Integrated Phase Noise
    • Programmable Tx I/Q Lowpass Anti-Aliasing Filter
    • Sigma-Delta Fractional-N PLL with 20Hz Step Size
    • 45dB Tx Gain-Control Range
    • 94dB Receive Gain-Control Range
    • 60dB Analog RSSI Instantaneous Dynamic Range
    • 4-Wire SPI Digital Interface
    • I/Q Analog Baseband Interface
    • Digitally Tuned Crystal Oscillator
    • On-Chip Digital Temperature Sensor Read-Out
● +2.7V to +3.6V Transceiver Supply
● Low-Power Shutdown Current
● Small 48-Pin Thin QFN Package (6mm x 6mm x 0.8mm)

Applications
● 802.16-2004 Fixed WiMAX®
● Korea Wibro and 802.16e Mobile WiMAX
● Dual Mode™ WiMAX/802.11b/g Wi-Fi
● Proprietary Wireless Broadband Systems
● 4G/LTE Systems