Dual Band Direct Conversion Transceiver

The Intersil ISL3690 is a highly integrated UHF2 process, DUAL BAND direct conversion transceiver and is part of a 2.4/5.2GHz, IEEE802.11a/b/g compliant radio chipset. The ISL3690 directly interfaces with Intersil’s ISL3890 Medium Access Controller with Integrated Baseband processor. The addition of Intersil’s ISL3990 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 or 5.15 to 5.35GHz
• 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 ISL3890
• QFN Package:
    - Compliant to JEDEC PUB95 MO-220
        QFN - Quad Flat No Leads - Package Outline
    - Near Chip Scale Package footprint, which improves
        PCB efficiency and has a thinner profile

Applications
• PC card wireless LAN adapters
• High data rate wireless LAN systems targeting IEEE802.11 a/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