TDA7429S
TDA7429T
DIGITALLY CONTROLLED AUDIO PROCESSOR
WITH SURROUND SOUND MATRIX
3 STEREO/4 STEREO INPUTS
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
TREBLE MIDDLE AND BASS CONTROL
THREE SURROUND MODES ARE AVAIL-
ABLE:
- MUSIC: 4 SELECTABLE RESPONSES
- MOVIE AND SIMULATED:
256 SELECTABLE RESPONSES
FOUR SPEAKERS ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL
IN 1dB STEPS FOR BALANCE FACILITY
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
DESCRIPTION
The TDA7429 is volume tone (bass middle and
treble) balance (Left/Right) processors for quality
audio applications in TV and Hi-Fi systems.
It reproduces surround sound by using program-
mable phase shifters and a signal matrix. 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.
July 1999
1
2
3
5
6
4
7
8
9
10
17
11
18
19
20
21
22
44
43
42
41
39
40
38
37
36
35
34
28
27
26
24
23
25
33
32
31
29
30
VAR_L
REARIN
REAROUT
HP1
LP1
HP2.
BASS_LI
BASS_LO
BASSO_R
BASSO_L
VAR_R
BASS_RO
BASS_RI
MIDDLE_LO
MIDDLE_LI
MIDDLE_RI
MIDDLE_RO
TREBLE_R
TREBLE_L
AGND
SDA
SCL
LP
PS1
PS2
PS3
V
S
PS4
CREF
R_IN4
R_IN3
R_IN2
R_IN1
L_IN4
AUXOUT_L
AUXOUT_R
R_OUT
DIG_GND
L_OUT
MONITOR_L
MONITOR_R
L_IN1
L_IN3
L_IN2
D96AU532
12
13
14
15
16
PIN CONNECTION (TQFP44)
ORDERING NUMBERS:
TDA7429S
TDA7429T
SDIP42
TQFP44
1/20
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V
S
Supply Voltage
7
9
10.2
V
V
CL
Max. input signal handling
2
Vrms
THD
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.01
0.1
%
S/N
Signal to Noise Ratio V
out
= 1Vrms (mode = OFF)
106
dB
S
C
Channel Separation f = 1KHz
90
dB
Treble Control
(2db step)
-14
+14
dB
Middle Control (2db step)
-14
+14
dB
Bass Control (2dB step)
-14
+14
dB
Balance Control
1dB step (L
CH,
R
CH
)
-79
0
dB
Mute Attenuation
100
dB
PS4
22nF
PS3
22nF
PS2
4.7nF
PS1
100nF
LP
1.2nF
LP1
5.6nF
HP1
680nF
VAR-L
2.2
F
HP2
BASSO-L
VAR-R
BASSO-R
AUXOUT-L
AUXOUT-R
L-OUT
R-OUT
V
S
CREF
100nF
10
F
22
F
220nF
R-IN4
0.47
F
R-IN3
0.47
F
R-IN2
0.47
F
DIG-GND
SCL
SDA
AGND
18nF
2.7K
MIDDLE-LO
MIDDLE-LI
22nF
18nF
2.7K
MIDDLE-RO
MIDDLE-RI
22nF
100nF
5.6K
BASS-LO
BASS-LI
100nF
100nF
5.6K
BASS-RO
BASS-RI
100nF
TREBLE-L
5.6nF
D96AU533
2.2
F
TREBLE-R
5.6nF
MONITOR_R
100nF
TDA7429
39
40
9
41
42
43
44
1
18
19
33
14
15
16
17
38
10
11
12
13
27
26
25
24
23
22
21
20
8
7
6
3
2
37
36
35
REARIN
2.2
F
REAROUT
4
5
R-IN1
0.47
F
34
L-IN1
0.47
F
31
L-IN2
0.47
F
30
L-IN3
0.47
F
29
L-IN4
0.47
F
28
MONITOR_L
32
TEST CIRCUIT (TDA7429T)
TDA7429S - TDA7429T
3/20
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