Direct Conversion Transceiver

The Intersil ISL3680 is a highly integrated UHF2 process, direct conversion transceiver and is part of a 2.4GHz, IEEE802.11b/g compliant radio chipset. The ISL3680 directly interfaces with Intersil’s ISL3880 Medium Access Controller with Integrated Baseband processor. The addition of Intersil’s ISL3980 power amplifier and ISL3090

10GHz VCO completes a WLAN transceiver application.

Features

• Highly integrated Dual Band RF to baseband solution

• Frequency of operation . . . . . . . . . . . . . . . . 2.4 to 2.5GHz

• Low supply operation . . . . . . . . . . . . . . . . . . . . 2.7 to 3.3V

• Noise figure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.4dB

• TX OFDM Output Power . . . . . . . . . . . . . . . . . . . . .-5dBm

• TX I/Q MTPR, PAR=12 . . . . . . . . . . . . . . . . . . . . . . -45dB

• RX Voltage gain . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 74dB

• RX I/Q MTPR, PAR=12, High Gain . . . . . . . . . . . . . -35dB

• TX/RX switching speed . . . . . . . . . . . . . . . . . . . . . . .<1µS

• Direct simple interface to ISL3880

Applications

• PC card wireless LAN adapters

• High data rate wirelessLAN systems targeting IEEE802.11 b/g standards

• Spread spectrum Dual Band WLAN RF modems

• TDMA or CSMA packet protocol Dual Band radios

• PCI wireless LAN cards

• ISA, ISA PnP WLAN cards