HFA3665

Features:

• RF Frequency Range. . . . . . . . . . . . 869MHz to 895MHz
• IF Operation . . . . . . . . . . . . . . . . . . . . 10MHz to 100MHz
• LNA Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16dB
• LNA NF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2.3dB
• Mixer Gain. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16dB
• Mixer NF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11dB
• Single Supply Battery Operation . . . . . . . . 2.7V to 3.3V
• Power Enable/Disable Control
• PIN Diode Attenuator DC Control


Application

• IS95A CDMA/AMPS Dual Mode Handsets
• Wideband CDMA Handsets
• CDMA/TDMA Packet Protocol Radios
• Full Duplex Transceivers
• Portable Battery Powered Equipment


Pinout




Specifications

Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3 to 3.6V
Voltage on Any Other Pin except 5 and 6 (6.0V) . -0.3 to V_CC +0.3V


Description

The HFA3665 is a monolithic bipolar downconverter for CDMA/AMPS cellular applications. Manufactured in the Intersil UHF1X process, the device consists of a low noise cascode amplifier, a double balanced downconversion mixer and a pair of linearized and temperature compensated PIN diode biasing current sources for external RF AGC applications. In addition, the device offers two independent and selectable differential mixer IF output ports to be used with dual mode IF filters and requires low drive levels from the local oscillator.

The HFA3665 is one of the four chips in the PRISM™ chip set and is housed in a small outline 28 lead SSOP package ideally suited for cellular handset applications.