TDA7438D013TR Ver la hoja de datos (PDF) - STMicroelectronics
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TDA7438D013TR Datasheet PDF : 19 Pages
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TDA7438
THREE BANDS
DIGITALLY CONTROLLED AUDIO PROCESSOR
1 FEATURES
■ INPUT MULTIPLEXER
– 3 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 TDA7438 is a volume tone (bass, middle and
treble) balance (Left/Right) processor for quality
audio applications in car-radio and Hi-Fi systems.
Figure 2. Block Diagram
Figure 1. Package
SO28
Table 1. Order Codes
Part Number
TDA7438
TDA7438D
TDA7438D013TR
DIP28
Package
DIP28
SO28
Tape & Reel
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.
3
L-IN1
4
L-IN2
5
L-IN3
100K
100K
100K
MUXOUTL INL
6
7
TREBLE(L) MIN(L) MOUT(L) BIN(L) BOUT(L)
18
17
16 14
15
RM
RB
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT
LEFT
27
LOUT
2
R-IN1
1
R-IN2
28
R-IN3
100K
100K
100K
0/30dB
2dB STEP
I2CBUS DECODER + LATCHES
21
SCL
22
SDA
20
DIG_GND
G
VOLUME
TREBLE
MIDDLE
BASS
SPKR ATT
RIGHT
VREF
INPUT MULTIPLEXER
+ GAIN
8
9
MUXOUTR INR
SUPPLY
RM
RB
19
10
11 12
13
23
TREBLE(R) MIN(R) MOUT(R) BIN(R) BOUT(R) CREF
26
ROUT
24
25 VS
AGND
D96AU488A
June 2004
REV. 7
1/19
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