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