®
TDA7439
THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER - 4 STEREO INPUTS - SELECTABLE INPUT GAIN...
®
TDA7439
THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER - 4 STEREO INPUTS - SELECTABLE INPUT GAIN FOR OPTIMAL ADAPTATION TO DIFFERENT SOURCES ONE STEREO OUTPUT TREBLE, MIDDLE 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 TDA7439 is a volume tone (bass, middle and treble) balance (Left/Right) processor for quality audio applications in car-radio and Hi-Fi systems. Selectable input gain is provided. Control of all the functions is accomplished by serial bus. BLOCK DIAGRAM (TDA7439)
MUXOUTL L-IN1 11 100K 12 100K 13 100K 14 100K 0/30dB 2dB STEP 100K 9 100K 8 G VOLUME TREBLE 15 INL 16 TREBLE(L) 27
SDIP30
DIP28
SO28 ORDERING NUMBERS: TDA7439 (SDIP30) TDA7439B (DIP28) TDA7439D (SO28)
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) 26 RM 25 23 RB
BOUT(L) 24
L-IN2
L-IN3
MIDDLE
BASS
SPKR ATT LEFT
6
LOUT
L-IN4
30 I2CBUS DECODER + LATCHES 1 29
SCL SDA DIG_GND
R-IN1
10
R-IN2
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT RIGHT V REF
5
ROUT
R-IN3
100K 7 100K INPUT MULTIPLEXER + GAIN 17 MUXOUTR 18 INR 28 TREBLE(R) 19 RM 20 21 RB 22 2
D95AU342B
3 SUPPLY 4
R-IN4
VS AGND
MIN(R...