TDA7540B

TDA7540B AM/FM Car Radio Tuner IC with Stereo Decoder and Intelligent Selectivity System (ISS) Features www.DataSheet4U.com ■ RF ■ ■ ■ ■ FM-Part AGC generation by RF and IF detection TQFP80 I/Q mixer for 1st FM IF 10.7MHz with image rejection Mixer for 2nd IF 450kHz Internal 450KHz bandpass filter with bandwidth control by ISS Fully integrated FM-demodulator with spike cancellation Additional Features ■ ■ ■ ■ ■ VCO for world tuning range High performance fast PLL for RDS-System IF counter for FM and AM with search stop signal Quality detector for level, deviation, adjacent channel and multipath ISS (Intelligent Selectivity System) for cancellation of adjacent channel and noise influences Adjacent channel mute Fully electronic alignment All functions I2C-Bus controlled AM-Part ■ ■ ■ ■ ■ Wide and narrow AGC generation Mixer for 1st IF 10.7MHz, AM upconversion Mixer for 2nd IF 450kHz, AM downconversion Integrated AM-demodulator AM IF- and audio noise blanking ■ ■ ■ Stereodecoder ■ ■ ■ ■ ■ ■ PLL with adjustment free, fully integrated VCO Automatic pilot dependent MONO/STEREO switching Programmable ROLL-OFF compensation High cut and stereo blend-characteristics programmable Dedicated RDS-mute Internal noise blanker with several threshold controls Description The TDA7540 is a high performance tuner circuit for AM/FM car radio. It contains mixer, IF amplifier, demodulator for AM and FM, stereodecoder, quality detection, ISS filter and PLL synthesizer with IF counter on a si...