TDA7345

® TDA7345 DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX 1 STEREO INPUT VOLUME CONTROL IN 1.25dB STEP TREBLE AND BASS CONTROL THREE SURROUND MODES ARE AVAILABLE: – MOVIE, MUSIC AND SIMULATED FOUR SPEAKER ATTENUATORS: – 4 INDEPENDENT SPEAKERS CONTROL IN 1.25dB STEPS FOR BALANCE FACILITY – INDEPENDENT MUTE FUNCTION ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS DESCRIPTION The TDA7345 is a volume tone (bass and treble) balance (Left/Right) processor for quality audio applications in car radio and Hi-Fi systems. It reproduces surround sound by using phase shifters and a signal matrix. Control of all the functions is accomplished by serial bus. The AC signal setting is obtained by resistor netPIN CONNECTION SO28 ORDERING NUMBER: TDA7345D works and switches combined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained. CREF PS2 PS1 LP1 HP1 HP2 L-in BASS-LA BASS-LB TREBLE-L REC_OUT_L REC_OUT_R Lout Rout 1 2 3 4 5 6 7 8 9 10 11 12 13 14 D94AU191A 28 27 26 25 24 23 22 21 20 19 18 17 16 15 Vs PS3 PS4 LP REAR IN REAR OUT R-in BASS-RA BASS-RB TREBLE-R DIG GND SDA SCL AGND November 1999 1/18 BASS-LB 100nF 5.6K 100nF 5.6nF BASS-RB 2/18 100nF 100nF 22nF 100nF 5.6nF 22nF 5.6K 100nF PS1 PS2 2 RPS2 SPKR ATT 11 PS1 90Hz PHASE SHIFTER SPKR ATT + MOVIE/ MUSIC OFF MOVIE/SIM 16 17 I2 C BUS DECODER + LATCHES 18 SCL SDA DIG GND L-R SIM MUSIC MIXING AMP VOL TREBLE MUTE BASS 13 LOUT PS2 4KHz PS3 400H...