The HFA3763 is a highly integrated baseband converter for quadrature modulation applications. The HFA3763 400MHz quadrature modulator and AGC is one of the seven chips in the PRISM® full duplex chip set (see Typical Application Diagram). It features all the necessary blocks for baseband modulation of I and Q signals. An output AGC and Baseband shaping filters are integrated in the design. Four filter bandwidths are programmable via a two bit digital control interface.

Features
• Integrates all IF Transmit Functions
• Broad Frequency Range . . . . . . . . . . . 10MHz to 400MHz
• I/Q Amplitude and Phase Balance . . . . . . . . . . . 0.2dB, 2°
• 5th Order Programmable
    Low Pass Filter. . . . . . . . . . . . . . . . . . .2.2MHz - 17.6MHz
• 400MHz Output AGC Amplifier/Attenuator . . . . . . . .45dB
• Selectable Digital or Analog TX Baseband Inputs
• Low LO Drive Level . . . . . . . . . . . . . . . . . . . . . . . -15dBm
• Fast Transmit-on Switching . . . . . . . . . . . . . . . . . . . . . 1µs
• Power Management/Standby Mode
• Single Supply 2.7V to 5.5V Operation

Applications
• Wireless Local Loop Systems
• Wireless Local Area Networks
• PCMCIA Wireless Duplex Transceivers
• ISM Systems
• TDMA Packet Protocol Radios
• PCS/Wireless PBX