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TDA7440 Datasheet

  • TDA7440

  • TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

  • 17頁

  • STMICROELECTRONICS   STMICROELECTRONICS

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TDA7440D
TONE CONTROL
DIGITALLY CONTROLLED AUDIO PROCESSOR
1
鈻?/div>
FEATURES
INPUT MULTIPLEXER
鈥?4 STEREO INPUTS
鈥?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:
鈥?TWO INDEPENDENT SPEAKER CONTROL
IN 1.0dB STEPS FOR BALANCE FACILITY
鈥?INDEPENDENT MUTE FUNCTION
ALL FUNCTION ARE PROGRAMMABLE VIA
SERIAL BUS
Figure 1. Package
SO-28
鈻?/div>
鈻?/div>
鈻?/div>
鈻?/div>
Table 1. Order Codes
Part Number
TDA7440D
TDA7440D013TR
Package
SO-28
Tape & Reel
鈻?/div>
2
DESCRIPTION
The TDA7440D is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in Hi-Fi systems.
Figure 2. Block Diagram
MUXOUTL
L-IN1
4
100K
5
100K
6
100K
7
100K
0/30dB
2dB STEP
100K
2
100K
1
G
VOLUME
8
INL
9
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
TREBLE(L)
18
BIN(L)
14
R
B
BOUT(L)
15
L-IN2
L-IN3
TREBLE
BASS
SPKR ATT
LEFT
27
LOUT
L-IN4
21
I CBUS DECODER + LATCHES
2
R-IN1
3
22
20
SCL
SDA
DIG_GND
R-IN2
G
VOLUME
TREBLE
BASS
SPKR ATT
RIGHT
V
REF
26
ROUT
R-IN3
100K
28
100K
INPUT MULTIPLEXER
+ GAIN
10
MUXOUTR
INR
11
19
TREBLE(R)
12
BIN(R)
R
B
13
BOUT(R)
23
CREF
D98AU883
24
SUPPLY
25
R-IN4
V
S
AGND
April 1999
REV. 3
1/17

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