TDA7344.PDF

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DIGITAL CONTROLLED AUDIO PROCESSOR WITH SURROUND SOUND MATRIX
TDA7344
DIGITAL CONTROLLED AUDIO PROCESSOR
WITH SURROUND SOUND MATRIX
1 STEREO INPUT
VOLUME CONTROL IN 1.25dB STEP
TREBLE AND BASS CONTROL
THREE SURROUND MODES ARE AVAIL-
ABLE:
– MOVIE, MUSIC AND SIMULATED
FOUR SPEAKER ATTENUATORS:
– 4 INDEPENDENT SPEAKERS CONTROL
IN 1.25dB STEPS FOR BALANCE FACILITY
– INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
PQFP44
(10 X 10)
SDIP42
ORDERING NUMBERS: TDA7344P (PQFP44)
TDA7344S (SDIP42)
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.
DESCRIPTION
The TDA7344 is a volume tone (bass and treble)
balance (Left/Right) processor for quality audio
applications in car radio and Hi-Fi systems.
It reproduces surround sound by using phase
PIN CONNECTIONS
February 1997
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TDA7344
BLOCK DIAGRAM
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TDA7344
TEST CIRCUIT
THERMAL DATA
Symbol
Description
Value
Unit
R th j-pins Thermal Resistance Junction-pins
Ma x.
85
°
C/W
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
QUICK REFERENCE DATA
Symbol
Parameter
Min.
Typ.
Max.
Unit
V S
Supply Voltage
7
9
10.5
V
V CL
Max. input signal handling
2
Vrms
THD
Total Harmonic Distortion V = 1Vrms f = 1KHz
0.02
0.1
%
S/N
Signal to Noise Ratio V out = 1Vrms (made = OFF)
106
dB
S C
Channel Separation f = 1KHz
70
dB
Volume Control 1.25dB step
-78.75
0
dB
Treble Control (2db step)
-14
+14
dB
Bass Control (2db step)
-14
+14
dB
Balance Control 1.25dB step (L CH, R CH )
-38.75
0
dB
Mute Attenuation
90
dB
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TDA7344
ELECTRICAL CHARACTERISTICS (refer to the test circuit T amb =25 ° C, V S = 9V, R L = 10K W ,
R G = 600 W , all controls flat (G = 0),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
10.5
V
I S
Supply Current
20
25
35
mA
SVR
Ripple Rejection
L CH /R CH out , Mode = OFF
60
80
dB
INPUT STAGE
R II
Input Resistance
35
50
65
K
W
V CL
Clipping Level
THD = 0.3%; Lin or Rin
2
2.5
Vrms
THD = 0.3%; Rin + Lin (2)
3.0
Vrms
C RANGE
Control Range
19.68
dB
A VMIN
Min. Attenuation
-1
0
1
dB
A VMAX
Max. Attenuation
18.68 19.68 20.68
dB
A STEP
Step Resolution
0.11
0.31
0.51
dB
V DC
DC Steps
adjacent att. step
-3
0
3
mV
VOLUME CONTROL
C RANGE
Control Range
70
75
dB
A VMIN
Min. Attenuation
-1
0
1
dB
A VMAX
Max. Attenuation
70
75
dB
A STEP
Step Resolution
Av = 0 to -40dB
0.5
1.25
1.75
dB
E A
Attenuation Set Error
Av = 0 to -20dB
Av = -20 to -60dB
-1.5
-3
0
1.5
2
dB
dB
E T
Tracking Error
2
dB
V DC
DC Steps
adjacent attenuation steps
From 0dB to Av max
-3
-5
0
0.5
3
5
mV
mV
BASS CONTROL (1)
Gb
Control Range
Max. Boost/cut
+11.5
+14
+16
dB
B STEP
Step Resolution
1
2
3
dB
R B
Internal Feedback Resistance
32
44
56
K
W
TREBLE CONTROL (1)
Gt
Control Range
Max. Boost/cut
+13
+14
+15
dB
T STEP
Step Resolution
0.5
2
1.5
dB
EFFECT CONTROL
C RANGE
Control Range
- 21
- 6
dB
S STEP
Step Resolution
1
dB
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TDA7344
ELECTRICAL CHARACTERISTICS (continued)
SURROUND SOUND MATRIX
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
G OFF
In-phase Gain (OFF)
Mode OFF , Input signal of
1kHz, 1.4 V p-p ,R in
-1.5
0
1.5
dB
"
R out
L in
"
L out
D GOFF
LR In-phase Gain Difference
(OFF)
Mode OFF , Input signal of
1kHz, 1.4 V p-p
(R in "
-1.5
0
1.5
dB
R out ), (L in
"
L out )
G MOV1
In-phase Gain (Movie 1)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
R in
7
dB
"
R out ,L in
"
L out
G MOV2
In-phase Gain (Movie 2)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
R in
8
dB
"
R out ,L in
"
L out
D GMOV
LR In-phase Gain Diffrence
(Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
(R in "
0
dB
R out )–(L in "
L out )
G MUS1
In-phase Gain (Music 1)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
(R in
6
dB
"
R out )–(L in
"
L out )
G MUS2
In-phase Gain (Music 2)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
R in
7.5
dB
"
R out ,L in
"
L out
D GMUS
LR In-phase Gain Difference
(Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
(R in "
0
dB
R out )–(L in "
L out )
L MON1
Simulated L Output 1
Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 V p-p ,R in and L in
4.5
dB
"
L ou t
L MON2
Simulated L Output 2
Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 V p-p ,R in and L in
– 4.0
dB
"
L ou t
L MON3
Simulated L Output 3
Simulated Mode, EffectCtrl = -6dB
Input signal of 3.6kHz,
1.4 V p-p ,R in and L in "
7.0
dB
L ou t
R MON1
Simulated R Output 1
Simulated Mode, Effect Ctrl = -6dB
Input signal of 250Hz,
1.4 V p-p ,R in and L in
– 4.5
dB
"
R out
R MON2
Simulated R Output 2
Simulated Mode, Effect Ctrl = -6dB
Input signal of 1kHz,
1.4 V p-p ,R in and L in
3.8
dB
"
R out
R MON3
Simulated R Output 3
Simulated Mode, Effect Ctrl = -6dB
Input signal of 3.6kHz,
1.4 V p-p ,R in and L in "
–20
dB
R out
R LP1
Low Pass Filter Resistance
7.5
10
12.5
K W
R PS1
Phase Shifter 1 Resistance
13.5
17.95
22.5
k
W
R PS2
Phase Shifter 2 Resistance
0.3
0.4
0.5
K
W
R PS3
Phase Shifter 3 Resistance
13.6
18.08
22.6
K
W
R PS4
Phase Shifter 4 Resistance
13.6
18.08
22.6
K
W
R HPF
High Pass Filter Resistance
45
60
75
K
W
R LPF
LP Pin Impedance
7.5
10
12.5
K
W
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