SGS Thomson Microelectronics TDA7442 Datasheet
TDA7442
®
TONE CONTROL AND SURROUND
DIGITALLY CONTROLLED AUDIO PROCESSOR
4 STERE O INPU T S
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 FUN CTIONS PROGR AMMABLE VI A SE-
RIAL BUS
2 MONITOR OUTPUT (ONLY FOR TDA7442)
DESCRIPTION
The TDA7442/42D is volume tone (bass and
treble) balance (Left/Right) processors for quality
audio applications in TV and Hi-Fi systems.
It reproduces surround sound by using a pro-
TDA7442D
SO28
ORDERING NUMBER: TDA7442D (SO28)
TDA7442 (SDIP32)
grammable phase shifter. Control of all the functions is accomplished by serial bus.
The AC signal setting is obtained by resistor networks and switches combined with operational
amplifiers.
Thanks to the BIPOLAR/CMOS Technology used,
Low Distortion, Low Noise and DC stepping are
obtained.
SDIP32
PIN CONNECTIONS
R_IN3
R_IN2
R_IN1
L_IN1
L_IN2 V
L_IN3
L_IN4
MUXOUTL
IN(L)
MUXOUT(R)
IN(R)
BIN(R)
BOUT(R)
BIN(L)
January 2001
1
2
3
4
5
6
7
8
9
10
11
12
13
14
D98AU948
SO28
28
27
26
25
24
22
21
20
19
18
17
16
15
R_IN4
LOUT
ROUT
AGND
S
CREF23
SDA
SCL
DIG-GND
TREBLE(R)
TREBLE(L)
PS1
LP
BOUT(L)
R-IN2
R-IN1
MONITOR(L)
MONITOR(R)
L-IN1 AGND
L-IN2
L-IN3
L-IN4
MUXOUT(L)
IN(L)
MUXOUT(R)
N.C.
IN(R)
BIN(R)
BOUT(R) LP18
BIN(L) BOUT(L)17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
D01AU1247
SDIP32
32
31
30
29
28
27
26
25
24
23
22
21
20
19
R-IN3
R-IN4
L-OUT
R-OUT
V
S
CREF
SDA
SCL
DIGGND
TREBLE-R
N.C.
TREBLE-L
PS1
1/16
TDA7442 - TDA7442D
BLOCK DIAGRAM (TDA7442)
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
L-IN1
L-IN2
L-IN3
L-IN4
R-IN1
R-IN2
R-IN3
R-IN4
5.6K
100nF
100nF
BIN(L)
BOUT(L)
171620193109
RB
FIX
BASS
I2C BUS DECODER + LATCHES
FIX
VAR
RB
BIN(R) BOUT(R)
100nF 100nF
5.6K
79dB CONTROL
-
VAR
+
FIX
+
-
SPKR
MUTE
SPKR
MUTE
79dB CONTROL
D98AU947B
ATT
30
LOUT
24
SCL
25
SDA
23
DIG GND
ATT
29
ROUT
AMP
AMP
5.6nF
TREBLE-L
OFF
SURR
TREBLE
TREBLE BASS
SURR
OFF
Vref
TREBLE-R
5.6nF
SYMULATED
+
100nF
PS1
RPS1
PS1
90Hz
MUSIC/
SYMULATED
SUPPLY
AGND
MIXING
MIXING
CREF
22µF
MUSIC
L-R
OFF
LPF
EFFECT
9KHz
CONTROL
V
LP
S
1.2nF
2.2µF
MONITOR(L)
MUXOUT(L)
5
50K
6
50K
7
50K
8
50K
2
50K
1
50K
32
50K
31
50K
31.5dB
control
31.5dB
control
4 1113 1827 2826 22 14 13
MUXOUT(R)
MONITOR(R)
IN(L)
30K
-
+
+
L+R
30K
IN(R)
2.2µF
BLOCK DIAGRAM (TDA7442D)
2.2µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
L-IN1
L-IN2
L-IN3
L-IN4
R-IN1
R-IN2
R-IN3
R-IN4
MUXOUT(L)
4
50K
5
50K
6
50K
7
50K
3
50K
2
50K
1
50K
28
50K
31.5dB
control
31.5dB
control
MUXOUT(R)
IN(L)
30K
-
+
+
L+R
30K
10 11 16 24 25 23 19 12 13
IN(R)
2.2µF
SYMULATED
+
5.6K
100nF
100nF
BIN(L)
BOUT(L)
1514181798
RB
FIX
BASS
I2C BUS DECODER + LATCHES
FIX
VAR
RB
BIN(R) BOUT(R)
100nF 100nF
5.6K
79dB CONTROL
-
VAR
+
FIX
+
-
SPKR
MUTE
SPKR
MUTE
79dB CONTROL
D01AU1248
ATT
27
LOUT
21
SCL
22
SDA
20
DIG GND
ATT
26
ROUT
AMP
AMP
5.6nF
TREBLE-L
OFF
SURR
TREBLE
TREBLE BASS
SURR
OFF
Vref
TREBLE-R
5.6nF
100nF
PS1
RPS1
PS1
90Hz
MUSIC/
SYMULATED
SUPPLY
AGND
MIXING
MIXING
CREF
22µF
MUSIC
L-R
OFF
LPF
EFFECT
9KHz
CONTROL
V
LP
S
1.2nF
2/16
TDA7442 - TDA7442D
QUICK REFERENCE DATA
Symbol Parameter Min. Typ. Max. Unit
V
V
CL
THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.01 0.1 %
S/N Signal to Noise Ratio V
S
THERMAL DATA
Symbol Description Value Unit
R
th j-pins
ABSOLUTE MAXIMUM RATINGS
Supply Voltage 7 9 10.2 V
S
Max. input signal handling 2 Vrms
= 1Vrms (mode = OFF) 106 dB
out
Channel Separation f = 1KHz 90 dB
C
Treble Control (2db step) -14 +14 dB
Bass Control (2dB step) -14 +14 dB
Balance Control 1dB step (L
) -79 0 dB
CH, RCH
Mute Attenuation 100 dB
Thermal Resistance Junction-pins Max. 85 °C/W
Symbol Parameter Value Unit
V
T
amb
T
Operating Supply Voltage 11 V
S
Operating Ambient Temperature -10 to 85 °C
Storage Temperature Range -55 to +150 °C
stg
3/16
TDA7442 - TDA7442D
ELECTRICAL CHARACTERISTICS
(refer to the test circuit T
= 25°C, VS = 9V, RL = 10KΩ,
amb
Vin = 1Vrms; RG = 600Ω, 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
I
S
SVR Ripple Rejection LCH / R
Supply Voltage 7 9 10.2 V
Supply Current 10 18 26 mA
, Mode = OFF 60 80 dB
CH out
INPUT STAGE
C
RANGE
A
A
A
R
IN
V
CL
VMIN
VMAX
STEP
Input Resistance 35 50 65 KΩ
Clipping Level THD = 0.3% 2 2.5 Vrms
Control Range 31.5 dB
Min. Attenuation -1 0 1 dB
Max. Attenuation 31 31.5 32 dB
Step Resolution 0.5 1 dB
BASS CONTROL
Gb Control Range Max. Boost/cut +11.5 +14.0 +16.0 dB
B
STEP
R
B
Step Resolution 1 2 3 dB
Internal Feedback Resistance 32 44 56 KΩ
TREBLE CONTROL
Gt Control Range Max. Boost/cut +13.0 +14.0 +15.0 dB
T
STEP
Step Resolution 1 2 3 dB
EFFECT CONTROL
C
RANGE
S
STEP
Control Range - 21 - 6 dB
Step Resolution 0.5 1 1.5 dB
SURROUND SOUND MATRIX PHASE
R
R
R
R
PS10
PS11
PS12
PS13
Phase Shifter 1: D1 = 0, D0 = 0 8.3 11.8 15.2 KΩ
Phase Shifter 1: D1 = 0, D0 = 1 10 14.1 18.3 KΩ
Phase Shifter 1: D1 = 1, D0 = 0 12.6 17.9 23.3 KΩ
Phase Shifter 1: D1 = 1, D0 = 1 26.4 37.3 48.85 KΩ
SURROUND SOUND MATRIX
TEST CONDITION (Phase Resistor Selection D0=0, D1=1, D2=0. D3=1, D4=0, D5=1, D6=0, D7=1
Symbol Parameter Test Condition Min. Typ. Max. Unit
G
D
OFF
GOFF
In-phase Gain (OFF) Mode OFF, Input signal of
LR In-phase Gain Difference
(OFF)
G
MUS
D
GMUS
In-phase Gain (Music) Music mode, Effect Ctrl = -6dB
LR In-phase Gain Difference
(Music)
1kHz, 1.4 V
L
→ L
in
out
, Rin → R
p-p
out
Mode OFF, Input signal of
1kHz, 1.4 V
R
→ R
in
Input signal of 1kHz, 1.4 V
(Rin → R
p-p
, L
out
in
), (Lin → L
out
→ L
out
out
p-p
)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
(Rin → R
) - (Lin → L
out
out
p-p
)
-1 0 1 dB
-1 0 1 dB
7dB
0dB
4/16
TDA7442 - TDA7442D
ELECTRICAL CHARACTERISTICS
(continued)
Symbol Parameter Test Condition Min. Typ. Max. Unit
SPEAKER ATTENUATORS
C
S
V
A
R
range
STEP
E
A
DC
MUTE
VEA
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
Av = -20 to -79dB -3 0 2 dB
DC Steps adjacent att. steps -3 0 3 mV
Output Mute Condition +70 100 dB
Input Impedance 21 30 39 KΩ
AUDIO OUTPUTS
N
O(OFF)
N
O(MUS)
N
O(PSEUDO)
d Distorsion Av = 0 ; V
S
C
V
OCL
R
OUT
V
OUT
Output Noise (OFF) Output Mute, Flat
B
= 20Hz to 20KHz
W
Output Noise (Music) Mode = Music ,
B
= 20Hz to 20KHz,
W
Output Noise (Pseudo Stereo) Mode = Pseudo Stereo
B
= 20Hz to 20KHz,
W
= 1Vrms 0.01 0.1 %
in
4
5
30 mVrms
30 mVrms
Channel Separation 70 90 dB
Clipping Level d = 0.3% 2 2.5 Vrms
Output Resistance 10 30 50 Ω
DC Voltage Level 3.8 V
µVrms
µVrms
MONITOR OUTPUTS
d Distorsion Av = 0 ; Vin = 1Vrms 0.01 0.1 %
S
C
V
OCL
R
OUT
V
OUT
Channel Separation 70 90 dB
Clipping Level d = 0.3% 2 2.5 Vrms
Output Resistance 20 50 70 Ω
DC Voltage Level 4.5 V
BUS INPUT S
V
IL
V
IH
I
IN
V
O
Input Low Voltage 1 V
Input High Voltage 3 V
Input Current -5 +5 µA
Output Voltage SDA
IO = 1.6mA 0.4 V
Acknowledge
5/16
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