TDA7440D

® TDA7440D TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR INPUT MULTIPLEXER - 4 STEREO INPUTS - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES ONE STEREO OUTPUT TREBLE AND BASS CONTROL IN 2.0dB STEPS VOLUME CONTROL IN 1.0dB STEPS TWO SPEAKER ATTENUATORS: - TWO INDEPENDENT SPEAKER CONTROL IN 1.0dB STEPS FOR BALANCE FACILITY - INDEPENDENT MUTE FUNCTION ALL FUNCTION ARE PROGRAMMABLE VIA SERIAL BUS DESCRIPTION The TDA7440D is a volume tone (bass and treble) balance (Left/Right) processor for quality audio applications in Hi-Fi systems. BLOCK DIAGRAM MUXOUTL L-IN1 4 100K 5 L-IN2 100K 6 100K 7 100K 0/30dB 2dB STEP 100K 2 100K 1 G VOLUME 8 INL 9 SO28 ORDERING NUMBER: TDA7440D Selectable input gain is provided. Control of all the functions is accomplished by serial bus. The AC signal setting is obtained by resistor networks and switches combined with operational amplifiers. Thanks to the used BIPOLAR/CMOS Technology, Low Distortion, Low Noise and DC stepping are obtained TREBLE(L) 18 BIN(L) 14 RB BOUT(L) 15 L-IN3 TREBLE BASS SPKR ATT LEFT 27 LOUT L-IN4 21 I CBUS DECODER + LATCHES 2 SCL SDA DIG_GND R-IN1 3 22 20 R-IN2 G VOLUME TREBLE BASS SPKR ATT RIGHT VREF 26 ROUT R-IN3 100K 28 R-IN4 100K INPUT MULTIPLEXER + GAIN 10 MUXOUTR INR 11 19 TREBLE(R) 12 BIN(R) SUPPLY RB 13 BOUT(R) 23 CREF D98AU883 24 25 VS AGND April 1999 1/16 TDA7440D PIN CONNECTION (Top view) R_IN3 R_IN2 R_IN1 L_IN1 L_IN2 L_IN3 L_IN4 MUXOUTL IN(L) MUXOUT(R) IN(R) B...