DESCRIPTION
Selectable input gain is provided. Control of all the functions is accomplished by serial bus. BLOCK DIAGRAM MUXOUTL L-IN1 3 100K 4 100K 5 100K G VOLUME TREBLE 6 INL 7 TREBLE(L) 18 SO28 DIP28 ORDERING NUMBER: TDA7438D (SO28) TDA7438 (DIP28) 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. MIN(L) MOUT(L) BIN(L) 17 RM 16 14 RB BOUT(L) 15 L-IN2 L-IN3 MIDDLE BASS SPKR ATT LEFT 27 LOUT R-IN1 2 100K 1 100K 28 0/30dB 2dB STEP 21 I2CBUS DECODER + LATCHES 22 20 SCL SDA DIG_GND R-IN2 G VOLUME TREBLE MIDDLE BASS SPKR ATT RIGHT V REF 26 ROUT R-IN3 100K 24 INPUT MULTIPLEXER + GAIN 8 MUXOUTR 9 INR 19 TREBLE(R) 10 SUPPLY RM 11 12 RB 13 23 D96AU488A 25 VS AGND MIN(R) MOUT(R) BIN(R) BOUT(R) CREF April 1999 1/17 TDA7438 ABSOLUTE MAXIMUM RATINGS
Symbol VS Tamb Tstg Operating Supply Voltage Operating Ambient Temperature Storage Temperature...
STMicroelectronics
