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TDA7439B Datasheet(Hoja de datos) 1 Page - STMicroelectronics

No. de Pieza. TDA7439B
Descripción  THREE BANDS DIGITALLY CONTROLLED AUDIO PROCESSOR
Descarga  19 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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1/19
TDA7439
June 2004
1FEATURES
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
2DESCRIPTION
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.
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
THREE BANDS
DIGITALLY CONTROLLED AUDIO PROCESSOR
Figure 2. Block Diagram
0/30dB
2dB STEP
MUXOUTL
INL
VOLUME
VOLUME
TREBLE
TREBLE
TREBLE(L)
MIDDLE
MIDDLE
MUXOUTR
INR
TREBLE(R)
BOUT(L)
SPKR ATT
LEFT
LOUT
SCL
SDA
DIG_GND
ROUT
D95AU342B
I
2CBUS DECODER + LATCHES
100K
100K
100K
100K
G
L-IN1
L-IN2
L-IN3
L-IN4
100K
100K
100K
100K
R-IN1
R-IN2
R-IN3
R-IN4
G
INPUT MULTIPLEXER
+ GAIN
MOUT(L)
BASS
BIN(L)
BASS
SPKR ATT
RIGHT
MIN(R) MOUT(R)
BOUT(R)
BIN(R)
SUPPLY
CREF
AGND
VS
MIN(L)
6
11
12
13
14
10
9
8
7
30
1
29
5
3
4
17
18
28
19
20
21
22
2
15
16
27
26
25
23
24
RM
RB
RM
RB
VREF
REV. 10
Figure 1. Package
Table 1. Order Codes
Part Number
Package
TDA7439
SDIP30
SDIP30




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