SGS Thomson Microelectronics TDA7429L Datasheet
3 BAND EQUALIZER AUDIO PROCESSOR
■
3 STEREO INPUTS
■ AUXILIARY MONO INPUT
■
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
■ TREBLE MIDDLE AND BASS CONTROL
■
FOUR SPEAKERS ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL IN
1dB STEPS FOR BALANCE FACILITY
- INDEPENDENT MUTE FUNCTION
■
SUBWOOFER OUTPUT (L+R)CONTROLLED
IN 1dB STEP INPUTS
■
ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL BUS
DESCRIPTION
The TDA7429L is volume tone (bass middle and treble) balance (Left/Right) processors for quality audio
applications in TV and Hi-Fi systems, providing also
TDA7429L
WITH SUBWOOFER CONTROL
SDIP42
ORDERING NUMBER: TDA7429L
an additional subwoofer control.
The AC signal setting is obtained by resistor networks
and switches combined with operational amplifiers.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are obtained.
Figure 1. Test Circuit
L+R OUTPUT 9
100nF
100nF
TREBLE_R
5.6nF
TREBLE_L
100nF
MONITOR_R
22nF
MIDDLE_LO
18nF
22nF
18nF
MIDDLE_LI
MIDDLE_RO
MIDDLE_RI
2.7K
2.7K
2.2µF
14
N.C.
1
N.C.
2
N.C.
3
N.C.
4
N.C.
7
LP
5
LP1
6
23
24
37
19
20
21
22
AUXOUT_L AUXOUT_R L_OUT R_OUT
BASSO_LVAR_RBASSO_R
13 12 11
32 31 30 29 28 27 26 25
2.2µF
VAR_L
0.47µF
MONO INPUT
DIG_GND SCL SDA AGND
0.47µF
R_IN3
10
40 39
0.47µF
R_IN2
38
35
34
33
42
41
8
15
16
17
18
R_IN1
MONITOR_L36
L_IN1
L_IN2
L_IN3
V
S
CREF
HP2
BASS_LO
BASS_LI
BASS_RO
BASS_RI
D99AU1029
0.47µF
0.47µF
0.47µF
0.47µF
100nF10µF
22µF
220nF
100nF
100nF
5.6K
100nF
100nF
5.6K
March 2000
1/16
TDA7429L
Figure 2. Pin Connection
N.C.
N.C.
N.C.
N.C.
LP
LP1
N.C.
HP2
L+R OUTPUT
MONO INPUT
VAR_L
BASSO_L
VAR_R
BASSO_R
BASS_LO
BASS_LI
BASS_RO
BASS_RI
MIDDLE_LO
MIDDLE_LI
MIDDLE_RO
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
D99AU1028
42
41
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
V
S
CREF
R_IN3
R_IN2
R_IN1
MONITOR_R
MONITOR_L
L_IN1
L_IN2
L_IN3
AUXOUT_L
AUXOUT_R
L_OUT
R_OUT
DIG_GND
SCL
SDA
AGND
TREBLE_L
TREBLE_R
MIDDLE_RI
Table 1. Quick Reference Data
Symbol Parameter Min. Typ. Max. Unit
V
V
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
2/16
Supply Voltage 7 9 10.2 V
S
Max. input signal handling 2 Vrms
CL
Channel Separation f = 1KHz 90 dB
C
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 (LCH, RCH) -79 0 dB
Mute Attenuation 100 dB
Figure 3. Block Diagram.
AUXOUT_L
32
ATT
SPKR
79dB CONTROL
30
L_OUT
MUTE
SCL
SDA
272628
DIG GND
ATT
SPKR
29
R_OUT
MUTE
AUXOUT_R
31
79dB CONTROL
TDA7429L
D99AU1030
5.6K
2.7K
100nF
100nF
22nF
18nF
5.6nF
100nF
2.2µF
BASSO_L VAR_L
BASS_LO
15 12 11
BASS_LI
MIDDLE_LO
MIDDLE_LI
20 19 16
24
TREBLE_L
LP1
6
30K
-
+
FIX
VAR
ATT
REC
MUTE
79dB CONTROL
FIX
RB
SURR
RM
OFF
3BAND
C BUS DECODER + LATCHES
2
REAR
LPF 1
+
I
BASS
MIDDLE
TREBLE
OFF
TREBLE MIDDLE BASS
L+R
CONTROL
LPF 2
-
+
30K
1314172337
50K
Vref
SUPPLY
MUTE
RM RB
VAR_R
BASSO_R
79dB CONTROL
22 21 18
TREBLE_R
910
L+R OUTPUT
LP
HP2
8
2.2µF
REARIN
100nF
22µF
CREF
AGND
BASS_RO
BASS_RI
100nF 100nF
MIDDLE_RO
18nF 22nF
MIDDLE_RI
5.6nF
0.47µF
5.6K
2.7K
FIX
VAR
ATT
REC
3BAND
FIX
SURR
REAR
OFF
31.5dB
control
36
MONITOR_L
35
0.47µF
L_IN1
50K
S
V
42 25 41 5
31.5dB
control
MONITOR_R
50K
50K
34
33
L_IN2
L_IN3
0.47µF
0.47µF
50K
50K
50K
38
39
40
R_IN3
R_IN2
R_IN1
0.47µF
0.47µF
0.47µF
THE SWITCHES POSITION MATCHES THERESET CONDITION
3/16
TDA7429L
Table 2. Thermal Data
Symbol Description Value Unit
R
th j-pins
Thermal Resistance Junction-pins Max.
85 °C/W
Table 3. Absolute Maximum Ratings
Symbol Parameter Value Unit
V
T
T
Operating Supply Voltage 11 V
S
Operating Ambient Temperature -10 to 85 °C
amb
Storage Temperature Range -55 to +150 °C
stg
Table 4. Electrical Characteristics
(refer to the test circuit T
=25°C, VS=9V,RL= 10KΩ,Vin=1V
amb
rms;RG
= 600Ω, all controls flat
(G = 0dB), L+R CTRL = +4dB, MODE = OFF; f = 1KHz unless otherwise specified).
Symbol Parameter Test Condition Min. Typ. Max. Unit
SUPPLY
V
SVR Ripple Rejection L
INPUT STAGE
R
V
C
RANGE
A
VMIN
A
VMAX
A
STEP
BASS CONTROL
Supply Voltage 7 9 10.2 V
S
Supply Current 10 18 26 mA
I
S
CH/RCH out
Input Resistance 35 50 65 KΩ
IN
Clipping Level THD = 0.3% 2 2.5 V
CL
, Mode = OFF 60 80 dB
Control Range 31.5 dB
Min. Attenuation -1 0 1 dB
Max. Attenuation 31 31.5 32 dB
Step Resolution 0.5 1 dB
rms
B
G
STEP
R
Control Range Max. Boost/cut ±11.5 ±14.0 ±16.0 dB
b
Step Resolution 1 2 3 dB
Internal Feedback Resistance 32 44 56 KΩ
B
MIDDLE CONTROL
M
G
STEP
R
Control Range Max. Boost/cut ±11.5 ±14.0 ±16.0 dB
m
Step Resolution 1 2 3 dB
Internal Feedback Resistance 17.5 25 32.5 KΩ
M
TREBLE CONTROL
G
Control Range Max. Boost/cut ±13.0 ±14.0 ±15.0 dB
t
T
STEP
Step Resolution 1 2 3 dB
4/16
TDA7429L
Table 4. Electrical Characteristics
(refer to the test circuit T
(G = 0dB), L+R CTRL = +4dB, MODE = OFF; f = 1KHz unless otherwise specified).
Symbol Parameter Test Condition Min. Typ. Max. Unit
CONTROL L+R
=25°C, VS=9V,RL= 10KΩ,Vin=1V
amb
rms;RG
= 600Ω, all controls flat
C
RANGE
S
STEP
Control Range - 11 +4 dB
Step Resolution 0.5 1 1.5 dB
SPEAKER & AUXATTENUATORS
C
RANGE
S
STEP
V
A
MUTE
R
E
Control Range 79 dB
Step Resolution -0.5 1 1.5 dB
Attenuation set error Av= 0 to -20dB -1.5 0 1.5 dB
A
A
= -20 to -79dB -3 0 2 dB
v
DC Steps adjacent att.steps -3 0 3 mV
DC
Output Mute Condition +70 100 dB
Input Impedance 21 30 39 KΩ
VEA
AUDIO OUTPUTS
N
O(OFF)
Output Noise (OFF) Output Mute, Flat
BW = 20Hz to 20KHz
d Distorsion Av=0;Vin=1V
V
R
V
S
OUT
Channel Separation 70 90 dB
C
Clipping Level d = 0.3% 2 2.5 Vrms
OCL
Output Resistance 20 40 70 Ω
OUT
DC Voltage Level 3.8 V
MONITOR OUTPUTS
rms
4
5
µV
µV
0.01 0.1 %
rms
rms
d Distorsion A
V
R
V
S
OUT
Channel Separation 70 90 dB
C
Clipping Level d = 0.3% 2 2.5 Vrms
OCL
Output Resistance 20 50 70 Ω
OUT
DC Voltage Level 4.5 V
BUS INPUTS
V
V
I
V
Input Low Voltage 1V
IL
Input High Voltage 3 V
IH
Input Current -5 +5 mA
IN
Output Voltage SDA
O
Acknowledge
=0;Vin=1V
v
rms
0.01 0.1 %
IO= 1.6mA 0.4 V
5/16
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