DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX
®
TDA7345
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX
1 STEREO INPUT VOLUME CONTROL IN 1.25dB STEP...
Description
®
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...
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