TDA7439 Datasheet, PDF (1/19 Pages) STMicroelectronics – THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7439
THREE BANDS
DIGITALLY CONTROLLED AUDIO PROCESSOR
1 FEATURES
■ 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
2 DESCRIPTION
The TDA7439 is a volume tone (bass, middle and
treble) balance (Left/Right) processor for quality
Figure 1. Package
SDIP30
Table 1. Order Codes
Part Number
TDA7439
Package
SDIP30
audio applications in car-radio and Hi-Fi systems.
Selectable input gain is provided. Control of all the
functions is accomplished by serial bus.
The AC signal setting is obtained by resistor net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained
Figure 2. Block Diagram
11
L-IN1
12
L-IN2
13
L-IN3
14
L-IN4
100K
100K
100K
100K
10
R-IN1
9
R-IN2
8
R-IN3
7
R-IN4
100K
100K
100K
100K
MUXOUTL INL
15
16
TREBLE(L) MIN(L) MOUT(L) BIN(L) BOUT(L)
27
26
25 23
24
R_M
R_B
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT
LEFT
6
LOUT
0/30dB
2dB STEP
I²CBUS DECODER + LATCHES
30
SCL
1
SDA
29
DIG_GND
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT
RIGHT
V_REF
INPUT MULTIPLEXER
+ GAIN
17
18
MUXOUTR INR
SUPPLY
R_M
R_B
28
19
20 21
22
2
TREBLE(R) MIN(R) MOUT(R) BIN(R) BOUT(R) CREF
5
ROUT
3
4 ^VS
AGND
D95AU342B
June 2004
REV. 10
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