HFA3665

TM PRELIMINARY May 1999 CT T ODU CEMEN 7 R P E A 74 T L OLE REP 00-442-7 OBS ENDED 8 M ns 1 l.com COM pplicatio Intersi E R @ NO ntral A app cent Ce : l l l i a a C or em HFA3665 Description CDMA/AMPS Downconverter with AGC Capability 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 Applications IS95A CDMA/AMPS Dual Mode Handsets Wideband CDMA Handsets CDMA/TDMA Packet Protocol Radios Full Duplex Transceivers Portable Battery Powered Equipment 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 req...