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TDA7449 Datasheet(PDF) 1 Page - STMicroelectronics

Part No. TDA7449
Description  TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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TDA7449 Datasheet(HTML) 1 Page - STMicroelectronics

 
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TDA7449
TONE CONTROL
DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER
- 2 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 TDA7449 is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in TV 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.
April 1999
®
0/30dB
2dB STEP
MUXOUTL
VOLUME
VOLUME
TREBLE
TREBLE
TREBLE(L)
BASS
BASS
MUXOUTR
TREBLE(R)
SPKR ATT
LEFT
LOUT
SCL
SDA
DIG_GND
ROUT
D98AU847A
I
2CBUS DECODER + LATCHES
100K
100K
G
L-IN1
L-IN2
100K
100K
R-IN1
R-IN2
G
INPUT MULTIPLEXER
+ GAIN
BOUT(L)
SPKR ATT
RIGHT
BIN(R) BOUT(R)
SUPPLY
CREF
AGND
VS
BIN(L)
5
8
9
7
6
19
20
18
4
2
3
11
17
12
13
1
10
16
15
14
RB
RB
VREF
BLOCK DIAGRAM
ORDERING NUMBER: TDA7449
DIP20
1/17


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