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ST Microelectronics - TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

Numéro de référence TDA7440
Description TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
Fabricant ST Microelectronics 
Logo ST Microelectronics 





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TDA7440 fiche technique
® 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
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 net-
works and switches combined with operational
amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained
4
L-IN1
5
L-IN2
6
L-IN3
7
L-IN4
100K
100K
100K
100K
3
R-IN1
2
R-IN2
1
R-IN3
28
R-IN4
100K
100K
100K
100K
MUXOUTL INL
89
TREBLE(L) BIN(L)
18 14
BOUT(L)
15
RB
G
VOLUME
TREBLE
BASS
SPKR ATT
LEFT
27
LOUT
0/30dB
2dB STEP
I2CBUS DECODER + LATCHES
21
SCL
22
SDA
20
DIG_GND
G
VOLUME
TREBLE
BASS
SPKR ATT
RIGHT
26
ROUT
VREF
INPUT MULTIPLEXER
+ GAIN
10 11
MUXOUTR INR
24
SUPPLY
25 VS
RB AGND
19 12
TREBLE(R) BIN(R)
13
BOUT(R)
23
CREF
D98AU883
April 1999
1/16

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