The Intersil 2.4GHz PRISM™ chip set is a highly integrated five-chip solution for RF modems employing Direct Sequence Spread Spectrum (DSSS) signaling. The HFA3724 400MHz Quadrature IF Modulator/Demodulator is one of the five chips in the PRISM™ chip set (see the Typical Application Diagram).

Features

• Integrates all IF Transmit and Receive Functions

• Broad Frequency Range . . . . . . . . . . . 10MHz to 400MHz

• I/Q Amplitude and Phase Balance . . . . . . . . . . . 0.2dB, 2o

• 5th Order Programmable

    Low Pass Filter. . . . . . . . . . . . . . . . . . .2.2MHz - 17.6MHz

• 400MHz Limiting IF Gain Strip with RSSI. . . . . . . . . .84dB

• Low LO Drive Level . . . . . . . . . . . . . . . . . . . . . . . -15dBm

• Fast Transmit-Receive Switching . . . . . . . . . . . . . . . . . 1µs

• Power Management/Standby Mode

• Single Supply 2.7V to 5.5V Operation

Applications

• Systems Targeting IEEE 802.11 Standard

• TDD Quadrature-Modulated Communication Systems

• Wireless Local Area Networks

• PCMCIA Wireless Transceivers

• ISM Systems

• TDMA Packet Protocol Radios

• PCS/Wireless PBX

• Wireless Local Loop