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Электронный компонент: 7429

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TDA7429L
March 2000
s
3 STEREO INPUTS
s
AUXILIARY MONO INPUT
s
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
s
TREBLE MIDDLE AND BASS CONTROL
s
FOUR SPEAKERS ATTENUATORS:
- 4 INDEPENDENT SPEAKERS CONTROL IN
1dB STEPS FOR BALANCE FACILITY
- INDEPENDENT MUTE FUNCTION
s
SUBWOOFER OUTPUT (L+R) CONTROLLED
IN 1dB STEP INPUTS
s
ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL BUS
DESCRIPTION
The TDA7429L is volume tone (bass middle and tre-
ble) balance (Left/Right) processors for quality audio
applications in TV and Hi-Fi systems, providing also
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 ob-
tained.
SDIP42
ORDERING NUMBER: TDA7429L
3 BAND EQUALIZER AUDIO PROCESSOR
WITH SUBWOOFER CONTROL
Figure 1. Test Circuit
N.C.
N.C.
N.C.
N.C.
N.C.
LP
LP1
100nF
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_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
D99AU1029
2.2
F
TREBLE_R
100nF
MONITOR_R
100nF
42
1
14
2
3
4
5
6
23
24
37
19
20
21
22
41
15
16
17
18
32
31
30
29
28
27
26
25
13
12
11
8
7
40
39
MONO INPUT
0.47
F
L+R OUTPUT
9
10
R_IN1
0.47
F
38
L_IN1
0.47
F
35
L_IN2
0.47
F
34
L_IN3
0.47
F
33
MONITOR_L
36
TDA7429L
2/16
Figure 2. Pin Connection
Table 1. 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 (LCH, RCH)
-79
0
dB
Mute Attenuation
100
dB
1
3
2
4
5
6
7
8
9
AUXOUT_R
AUXOUT_L
L_IN3
L_IN1
L_IN2
MONITOR_L
MONITOR_R
R_IN1
R_IN2
37
36
35
34
33
31
32
30
29
D99AU1028
10
11
12
13
14
42
41
40
39
38
R_IN3
CREF
V
S
15
16
MIDDLE_RI
TREBLE_R
TREBLE_L
SCL
SDA
DIG_GND
R_OUT
28
27
26
24
25
23
22
17
18
19
20
21
LP1
N.C.
HP2
L+R OUTPUT
MONO INPUT
BASSO_L
VAR_L
VAR_R
BASSO_R
N.C.
N.C.
N.C.
N.C.
LP
BASS_LO
BASS_LI
BASS_RO
MIDDLE_LO
BASS_RI
MIDDLE_LI
MIDDLE_RO
L_OUT
AGND
3/16
TDA7429L
Figure 3. Block Diagram.
L_IN1
0.47
F
SUPPLY
V
S
AGND
CREF
TREBLE
18nF
MIDDLE
2.7K
MIDDLE_LI
MIDDLE_LO
22nF
RM
BASS
BASS_LI
MUTE
D99AU1030
MUTE
I2
C
BUS
DECODER
+
LATCHES
SPKR
ATT
REC
ATT
TREBLE
MIDDLE
BASS
18nF
22nF
2.7K
5.6nF
MUTE
SPKR
ATT
MUTE
REC
ATT
SCL
SDA
DIG
GND
R_OUT
AUXOUT_R
L_OUT
AUXOUT_L
22
F
+
LP1
HP2
100nF
R_IN3
0.47
F
50K
LPF
1
OFF
LPF
2
L+R
CONTROL
100nF
LP
MIDDLE_RI
MIDDLE_RO
35
6
8
40
42
25
41
5
20
19
16
30
22
21
18
32
27
26
28
29
31
MONITOR_R
TREBLE_R
79dB
CONTROL
5.6nF
TREBLE_L
100nF
5.6K
100nF
BASS_LO
100nF
100nF
5.6K
BASS_RI
BASS_RO
79dB
CONTROL
79dB
CONTROL
2.2
F
BASSO_R
VAR_R
30K
+
-
+
-
2.2
F
BASSO_L
VAR_L
30K
79dB
CONTROL
15
12
11
13
14
17
23
37
24
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
31.5dB
control
R_IN2
R_IN1
31.5dB
control
L_IN2
L_IN3
0.47
F
50K
REARIN
L+R
OUTPUT
34
33
38
39
91
0
Vref
OFF
OFF
RM
RB
SURR
REAR
FIX
3BAND
SURR
REAR
FIX
3BAND
FIX
VAR
RB
FIX
VAR
THE
SWITCHES
POSITION
MATCHES
THE
RESET
CONDITION
36
MONITOR_L
TDA7429L
4/16
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
S
Operating Supply Voltage
11
V
T
amb
Operating Ambient Temperature
-10 to 85
C
T
stg
Storage Temperature Range
-55 to +150
C
Table 4. Electrical Characteristics
(refer to the test circuit T
amb
= 25
C, V
S
= 9V, R
L
= 10K
,V
in
= 1V
rms
; R
G
= 600
, all controls flat
(G = 0dB), L+R CTRL = +4dB, MODE = OFF; f = 1KHz unless otherwise specified).
Symbol
Parameter
Test Conditio n
Min.
Typ.
Max.
Unit
SUPPLY
V
S
Supply Voltage
7
9
10.2
V
I
S
Supply Current
10
18
26
mA
SVR
Ripple Rejection
L
CH
/ R
CH out
, Mode = OFF
60
80
dB
INPUT STAGE
R
IN
Input Resistance
35
50
65
K
V
CL
Clipping Level
THD = 0.3%
2
2.5
V
rms
C
RANGE
Control Range
31.5
dB
A
VMIN
Min. Attenuation
-1
0
1
dB
A
VMAX
Max. Attenuation
31
31.5
32
dB
A
STEP
Step Resolution
0.5
1
dB
BASS CONTROL
G
b
Control Range
Max. Boost/cut
11.5
14.0
16.0
dB
B
STEP
Step Resolution
1
2
3
dB
R
B
Internal Feedback Resistance
32
44
56
K
MIDDLE CONTROL
G
m
Control Range
Max. Boost/cut
11.5
14.0
16.0
dB
M
STEP
Step Resolution
1
2
3
dB
R
M
Internal Feedback Resistance
17.5
25
32.5
K
TREBLE CONTROL
G
t
Control Range
Max. Boost/cut
13.0
14.0
15.0
dB
T
STEP
Step Resolution
1
2
3
dB
5/16
TDA7429L
CONTROL L+R
C
RANGE
Control Range
- 11
+4
dB
S
STEP
Step Resolution
0.5
1
1.5
dB
SPEAKER & AUX ATTENUATORS
C
RANGE
Control Range
79
dB
S
STEP
Step Resolution
-0.5
1
1.5
dB
E
A
Attenuation set error
A
v
= 0 to -20dB
-1.5
0
1.5
dB
A
v
= -20 to -79dB
-3
0
2
dB
V
DC
DC Steps
adjacent att. steps
-3
0
3
mV
A
MUTE
Output Mute Condition
+70
100
dB
R
VEA
Input Impedance
21
30
39
K
AUDIO OUTPUTS
N
O(OFF)
Output Noise (OFF)
Output Mute, Flat
BW = 20Hz to 20KHz
4
5
V
rms
V
rms
d
Distorsion
A
v
= 0 ; V
in
= 1V
rms
0.01
0.1
%
S
C
Channel Separation
70
90
dB
V
OCL
Clipping Level
d = 0.3%
2
2.5
Vrms
R
OUT
Output Resistance
20
40
70
V
OUT
DC Voltage Level
3.8
V
MONITOR OUTPUTS
d
Distorsion
A
v
= 0 ; V
in
= 1V
rms
0.01
0.1
%
S
C
Channel Separation
70
90
dB
V
OCL
Clipping Level
d = 0.3%
2
2.5
Vrms
R
OUT
Output Resistance
20
50
70
V
OUT
DC Voltage Level
4.5
V
BUS INPUTS
V
IL
Input Low Voltage
1
V
V
IH
Input High Voltage
3
V
I
IN
Input Current
-5
+5
mA
V
O
Output Voltage SDA
Acknowledge
I
O
= 1.6mA
0.4
V
Table 4. Electrical Characteristics
(refer to the test circuit T
amb
= 25
C, V
S
= 9V, R
L
= 10K
,V
in
= 1V
rms
; R
G
= 600
, all controls flat
(G = 0dB), L+R CTRL = +4dB, MODE = OFF; f = 1KHz unless otherwise specified).
Symbol
Parameter
Test Conditio n
Min.
Typ.
Max.
Unit