General Description

The MAX2720/MAX2721 are low-cost, high-performance, direct I/Q modulators designed for use in wideband CDMA and wireless local-loop (WLL) systems. Their direct-upconversion architecture reduces system cost, component count, and board space compared to devices with dual-conversion architectures.

Features

♦ RF Frequency Range

    1.7GHz to 2.1GHz (MAX2720)

    2.1GHz to 2.5GHz (MAX2721)

♦ Integrated I/Q Modulator, LO Doubler, VGA, and PA Driver

♦ 35dB VGA Gain Control Range

♦ 35dBc Sideband Suppression

♦ 30dBc Carrier Suppression

♦ Low Supply Current

    77mA (MAX2720), 86mA (MAX2721)

    20mA Reduction with PA Driver Disabled

♦ 0.1µA Supply Current in Shutdown Mode

♦ +2.7V to +3.3V Single-Supply Operation

Applications

    Wireless Local Loop (WLL)

    Wideband CDMA Systems

    LMDS/MMDS

    2.4GHz Broadband ISM Radios

    DCS/PCS Base Stations