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PDF TDA7449L Data sheet ( Hoja de datos )
| Número de pieza | TDA7449L | |
| Descripción | LOW COST DIGITALLY CONTROLLED AUDIO PROCESSOR | |
| Fabricantes | ST Microelectronics | |
| Logotipo |  |
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® TDA7449L
LOW COST
DIGITALLY CONTROLLED AUDIO PROCESSOR
INPUT MULTIPLEXER
- 2 STEREO INPUTS
- SELECTABLE INPUT GAIN FOR OPTIMAL
ADAPTATION TO DIFFERENT SOURCES
ONE STEREO OUTPUT
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
DIP20
ORDERING NUMBER: TDA7449L
DESCRIPTION
The TDA7449L is a volume control and balance
(Left/Right) processor for quality audio applica-
tions 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.
BLOCK DIAGRAM
8
L-IN1
9
L-IN2
100K
100K
MUXOUTL
10
G VOLUME
SPKR ATT
LEFT
5
LOUT
7
R-IN1
6
R-IN2
100K
100K
0/30dB
2dB STEP
I2CBUS DECODER + LATCHES
19
SCL
20
SDA
18
DIG_GND
G VOLUME
INPUT MULTIPLEXER
+ GAIN
11
MUXOUTR
SPKR ATT
RIGHT
VREF
SUPPLY
1
CREF
4
ROUT
2
3 VS
AGND
D98AU868
April 1999
1/13
1 page  
Figure 2: THD vs. frequency
Figure 3: THD vs. RLOAD
TDA7449L
Figure 4: Channel separation vs. frequency
5/13
5 Page 
PINS: 6,7,8,9
VS
IN
100K
VREF
PIN: 19
PINS: 10,11
20µA
VS VS
MUXOUT
TDA7449L
20µA
D96AU425
GND
D96AU491
PIN: 20
SCL
20µA
SDA
20µA
D96AU424
D96AU423
11/13
11 Page | ||
| Páginas | Total 13 Páginas | |
| PDF Descargar | [ Datasheet TDA7449L.PDF ] | |
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