TDA7440_10 Datasheet, PDF (1/17 Pages) STMicroelectronics – TONE CONTROL DIGITALLY CONTROLLED AUDIO PROCESSOR

TDA7440
TONE CONTROL
DIGITALLY CONTROLLED AUDIO PROCESSOR
1 FEATURES
„ 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
2 DESCRIPTION
The TDA7440D is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in Hi-Fi systems.
Figure 1. Package
SO-28
Table 1. Order Codes
Order code
TDA7440D
TDA7440D013TR
Package
SO-28
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
Figure 2. Block Diagram
4
L-IN1
5
L-IN2
6
L-IN3
100K
100K
100K
MUXOUTL INL
8
9
TREBLE(L) BIN(L)
18
14
BOUT(L)
15
R_B
G
VOLUME
TREBLE
BASS
SPKR ATT
LEFT
27
LOUT
7
L-IN4
100K
3
R-IN1
100K
0/30dB
2dB STEP
I²CBUS DECODER + LATCHES
21
SCL
22
SDA
20
DIG_GND
2
R-IN2
1
R-IN3
28
R-IN4
100K
100K
100K
G
VOLUME
TREBLE
BASS
SPKR ATT
RIGHT
26
ROUT
V_REF
INPUT MULTIPLEXER
+ GAIN
10
11
MUXOUTR INR
24
SUPPLY
25 ^VS
R_B
AGND
19
12
TREBLE(R) BIN(R)
13
BOUT(R)
23
CREF
D98AU883
April 2010
REV. 4
1/17