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TDA7442
TDA7442D
June 2004
1
FEATURES
4 STEREO INPUTS
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
TREBLE AND BASS CONTROL
TWO SURROUND MODE AVAILABLE WITH 4
SELECTABLE RESPONSES:
MUSIC
SIMULATED STEREO
TWO SPEAKER ATTENUATORS:
2 INDEPENDENT SPEAKER CONTROLS IN
1dB STEPS FOR BALANCE FACILITY
INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA
SERIAL BUS
2 MONITOR OUTPUT (ONLY FOR TDA7442)
2
DESCRIPTION
The TDA7442/42D is volume tone (bass and tre-
ble) balance (Left/Right) processors for quality au-
dio applications in TV and Hi-Fi systems.
It reproduces surround sound by using a program-
mable phase shifter. 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 BIPOLAR/CMOS Technology used,
Low Distortion, Low Noise and DC stepping are
obtained.
TONE CONTROL AND SURROUND
DIGITALLY CONTROLLED AUDIO PROCESSOR
Figure 2. Pin Connections (Top views)
L_IN3
L_IN4
MUXOUTL
IN(L)
MUXOUT(R)
BIN(R)
IN(R)
BOUT(R)
BIN(L)
1
3
2
4
5
6
7
8
9
BOUT(L)
LP
PS1
TREBLE(R)
TREBLE(L)
SCL
SDA
DIG-GND
CREF
23
22
21
20
19
17
18
16
15
D98AU948
10
11
12
13
14
28
27
26
25
24
R_IN3
R_IN2
R_IN1
L_IN1
L_IN2
V
S
AGND
ROUT
LOUT
R_IN4
L-IN2
L-IN3
L-IN4
MUXOUT(L)
IN(L)
N.C.
MUXOUT(R)
IN(R)
BIN(R)
1
3
2
4
5
6
7
8
9
PS1
TREBLE-L
N.C.
DIGGND
TREBLE-R
SCL
SDA
CREF
V
S
27
26
25
24
23
21
22
20
19
D01AU1247
10
11
12
13
14
32
31
30
29
28
R-IN2
R-IN1
MONITOR(L)
MONITOR(R)
L-IN1
AGND
R-OUT
L-OUT
R-IN4
R-IN3
BIN(L)
BOUT(L)
17
16
BOUT(R)
LP
18
15
SO28
SDIP32
Figure 1. Packages
Table 1. Order Codes
Part Number
Package
TDA7442
SDIP-32
TDA7442D
SO-28
TDA7442D013TR
Tape & Reel
SO-28
SDIP-32
REV. 2
TDA7442 - TDA7442D
2/17
Figure 3. Block Diagram (TDA7442)
Figure 4. Block Diagram (TDA7442D)
L-IN1
5
6
7
8
2
1
32
31
4
11
13
18
27
28
26
22
14
13
29
23
25
24
30
17
16
20
19
3
10
9
L-R
0.47
F
SUPPLY
VS
AGND
CREF
TREBLE
BASS
BIN(L)
MUTE
D98AU947B
I2C BUS DECODER + LATCHES
SPKR
ATT
TREBLE
BASS
5.6nF
MUTE
SPKR
ATT
SCL
SDA
DIG GND
ROUT
LOUT
22
F
+
-
+
-
+
R-IN4
0.47
F
50K
PS1
90Hz
100nF
PS1
RPS1
SYMULATED
MUSIC
MUSIC/
SYMULATED
OFF
MIXING
AMP
LPF
9KHz
EFFECT
CONTROL
MIXING
AMP
1.2nF
LP
TREBLE-R
5.6nF
TREBLE-L
100nF
5.6K
100nF
BOUT(L)
100nF
100nF
5.6K
BIN(R)
BOUT(R)
79dB CONTROL
+
-
+
-
79dB CONTROL
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
31.5dB
control
R-IN3
R-IN2
R-IN1
31.5dB
control
L-IN2
L-IN3
L-IN4
Vref
OFF
SURR
OFF
SURR
RB
FIX
FIX
VAR
RB
FIX
VAR
L+R
30K
30K
2.2
F
2.2
F
MUXOUT(R)
IN(R)
MONITOR(L)
MONITOR(R)
MUXOUT(L)
IN(L)
L-IN1
4
5
6
7
3
2
1
28
10
11
16
24
25
23
19
12
13
26
20
22
21
27
15
14
18
17
9
8
L-R
0.47
F
SUPPLY
VS
AGND
CREF
TREBLE
BASS
BIN(L)
MUTE
D01AU1248
I2C BUS DECODER + LATCHES
SPKR
ATT
TREBLE
BASS
5.6nF
MUTE
SPKR
ATT
SCL
SDA
DIG GND
ROUT
LOUT
22
F
+
-
+
-
+
R-IN4
0.47
F
50K
PS1
90Hz
100nF
PS1
RPS1
SYMULATED
MUSIC
MUSIC/
SYMULATED
OFF
MIXING
AMP
LPF
9KHz
EFFECT
CONTROL
MIXING
AMP
1.2nF
LP
TREBLE-R
5.6nF
TREBLE-L
100nF
5.6K
100nF
BOUT(L)
100nF
100nF
5.6K
BIN(R)
BOUT(R)
79dB CONTROL
+
-
+
-
79dB CONTROL
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
0.47
F
50K
31.5dB
control
R-IN3
R-IN2
R-IN1
31.5dB
control
L-IN2
L-IN3
L-IN4
Vref
OFF
SURR
OFF
SURR
RB
FIX
FIX
VAR
RB
FIX
VAR
L+R
30K
30K
2.2
F
2.2
F
MUXOUT(R)
IN(R)
MUXOUT(L)
IN(L)
3/17
TDA7442 - TDA7442D
Table 2. Quick Reference Data
Table 3. Thermal Data
Table 4. Absolute Maximum Ratings
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
Bass Control (2dB step)
-14
+14
dB
Balance Control 1dB step (L
CH
, R
CH
)
-79
0
dB
Mute Attenuation
100
dB
Symbol
Parameter
Value
Unit
R
th j-pins
Thermal Resistance Junction-pins
Max.
85
C/W
Symbol
Parameter
Value
Unit
V
S
Operating Supply Voltage
11
V
T
amb
Operating Ambient Temperature
-10 to 70
C
T
stg
Storage Temperature Range
-55 to +150
C
Table 5. Electrical Characteristics
Refer to the test circuit T
amb
= 25C, V
S
= 9V, R
L
= 10K
, V
in
= 1Vrms; R
G
= 600
, all controls flat (G =
0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified.
Symbol
Parameter
Test Condition
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
Vrms
C
RANGE
Control Range
31.5
dB
AV
MIN
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
TDA7442 - TDA7442D
4/17
TREBLE CONTROL
G
t
Control Range
Max. Boost/cut
+13.0
+14.0
+15.0
dB
T
STEP
Step Resolution
1
2
3
dB
EFFECT CONTROL
C
RANGE
Control Range
- 21
- 6
dB
S
STEP
Step Resolution
0.5
1
1.5
dB
SURROUND SOUND MATRIX PHASE
R
PS10
Phase Shifter 1: D1 = 0, D0 = 0
8.3
11.8
15.2
K
R
PS11
Phase Shifter 1: D1 = 0, D0 = 1
10
14.1
18.3
K
R
PS12
Phase Shifter 1: D1 = 1, D0 = 0
12.6
17.9
23.3
K
R
PS13
Phase Shifter 1: D1 = 1, D0 = 1
26.4
37.3
48.85
K
SURROUND SOUND MATRIX
TEST CONDITION (Phase Resistor Selection D0=0, D1=1, D2=0. D3=1, D4=0, D5=1, D6=0, D7=1
G
OFF
In-phase Gain (OFF)
Mode OFF, Input signal of
1kHz, 1.4
V
p-p
, R
in
R
out
L
in
L
out
-1
0
1
dB
D
GOFF
LR In-phase Gain Difference
(OFF)
Mode OFF, Input signal of 1kHz,
1.4 V
p-p
R
in
R
out
, L
in
L
ou
t
-1
0
1
dB
G
MUS
In-phase Gain (Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
p-p
(R
in
R
out
), (L
in
L
out
)
7
dB
D
GMUS
LR In-phase Gain Difference
(Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
p-p
(R
in
R
out
) - (L
in
L
out
)
0
dB
SPEAKER ATTENUATORS
C
range
Control Range
79
dB
S
STEP
Step Resolution
-0.5
1
1.5
dB
E
A
Attenuation set error
Av = 0 to -20dB
-1.5
0
1.5
dB
Av = -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
B
W
= 20Hz to 20KHz
4
5
Vrms
Vrms
N
O(MUS)
Output Noise (Music)
Mode = Music ,
B
W
= 20Hz to 20KHz,
30
mVrms
N
O(PSEUDO)
Output Noise (Pseudo Stereo)
Mode = Pseudo Stereo
B
W
= 20Hz to 20KHz,
30
mVrms
d
Distorsion
Av = 0 ; V
in
= 1Vrms
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
10
30
50
Table 5. Electrical Characteristics (continued)
Refer to the test circuit T
amb
= 25C, V
S
= 9V, R
L
= 10K
, V
in
= 1Vrms; R
G
= 600
, all controls flat (G =
0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
5/17
TDA7442 - TDA7442D
V
OUT
DC Voltage Level
3.8
V
MONITOR OUTPUTS
d
Distorsion
Av = 0 ; V
in
= 1Vrms
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
A
V
O
Output Voltage SDA
Acknowledge
I
O
= 1.6mA
0.4
V
Table 5. Electrical Characteristics (continued)
Refer to the test circuit T
amb
= 25C, V
S
= 9V, R
L
= 10K
, V
in
= 1Vrms; R
G
= 600
, all controls flat (G =
0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz unless otherwise specified.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
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