HFA3683A

HFA3683A TM Data Sheet June 2000 File Number 4634.5 2.4GHz RF/IF Converter and Synthesizer The HFA3683A is a monolithic SiGe half-duplex RF/IF transceiver designed to operate in the 2.4GHz ISM band. The receive chain features a low noise, gain selectable amplifier (LNA) followed by a down-converter mixer. An up-converter mixer and a high performance preamplifier compose the transmit chain. The remaining circuitry comprises a high frequency Phase Locked Loop (PLL) synthesizer with a three wire programmable interface for local oscillator applications. A reduced filter count is realized by multiplexing the receive and transmit IF paths and by sharing a common differential matching network. Furthermore, both transmit and receive RF amplifiers can be directly connected to mixers. The inherent image rejection of both the transmit and receive functions allow this economic advantage. The HFA3683A is housed in a 64 lead TQFP package well suited for PCMCIA board applications. Features Highly Integrated Multiplexed RX/TX IF Path Utilizes Single IF Filter Programmable Synthesizer Gain Selectable LNA Power Management/Standby Mode Single Supply 2.7V to 3.3V Operation Cascaded LNA/Mixer (High Gain) Gain . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25dB SSB Noise Figure. . . . . . . . . . . . . . . . . . . . . . . . . . . 3.7dB Input IP3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -13dBm IF Frequency . . . . . . . . . ....