Description
The front-end is a high performance tuner circuit for AM/FM - DSP car-radios with 10.7MHz IF sampling. It contains mixer and IF amplifiers for AM and FM, fully integrated VCO and PLL synthesizer on a singlechip. Use of BiCMOS technology allows the implementation of several tuning functions and a minimum of external components.

FEATUREs
■ Fully integrated VCO for world tuning
■ High performance PLL for fast RDS system
■ I/Q mixer for FM IF 10.7MHz with image rejection and integrated LNA
■ I/Q mixer for AM IF 10.7MHz up conversion with high dynamic range
■ Integrated balun, Which allows saving of external mixer tank
■ RF AGC, IF AGC, DAGC
■ Low noise IF amplifier with switched wide dynamic AGC range
■ IF switch for FM / AM / IBOC
■ Electronic alignment for the preselection stages
■ I2C/SPI controlled
■ single 5v SUPPLY
■ Alternative frequency control signals to DSP