HFA3763

Features:

• Integrates all IF Transmit 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 Output AGC Amplifier/Attenuator . . . . . . . .45dB
• Selectable Digital or Analog TX Baseband Inputs
• Low LO Drive Level . . . . . . . . . . . . . . . . . . . . . . . -15dBm
• Fast Transmit-on Switching . . . . . . . . . . . . . . . . . . . . . 1ms
• Power Management/Standby Mode
• Single Supply 2.7V to 5.5V Operation


Application

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


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.0V
Voltage on Any Other Pin. . . . . . . . . . . . . . . . . . -0.3V to V_CC +0.3V


Description

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. In addition, these filters are continuously tunable over a ±20% frequency range via one external resistor. The modulator channel receives digital or analog I and Q data for processing. To achieve broadband operation, the Local Oscillator frequency input is required to be twice the desired frequency of modulation. A selectable buffered divide by 2 LO output and a stable reference voltage are provided for convenience of the user.