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Электронный компонент: 7464

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TDA7464
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH
SRS SURROUND SOUND AND VOICE CANCELLER
4 STEREO INPUTS
INPUT ATTENUATION CONTROL IN 0.5dB
STEP
TREBLE MIDDLE AND BASS CONTROL
VOICE CANCELLER IS AVAILABLE
STEREO SRS SURROUND SOUND WITH
CENTER & SPACE CONTROL IS AVAILABLE
THREE STANDARD SURROUND MODES
ARE AVAILABLE:
- MUSIC IN 4 DIFFERENT SELECTABLE
RESPONSES
- MOVIE AND SIMULATED IN 256
DIFFERENT SELECTABLE RESPONSES
2 SPEAKERS OUTPUTS
- INDEPENDENT ATTENUATORS IN 1dB
STEP FOR BALANCE FACILITY
- ZERO CROSSING ATTENUATION AVAILABLE
- INDEPENDENT MUTE FUNCTION
2 RECORD OUTPUTS
- INDEPENDENT ATTENUATORS IN 1dB
STEP FOR BALANCE FACILITY
- MUX AVAILABLE FOR PROCESSES SIGNAL
SELECTION
- INDEPENDENT MUTE FUNCTION
ALL FUNCTIONS PROGRAMMABLE VIA SE-
RIAL BUS
DESCRIPTION
The TDA7464 is a volume tone (bass middle and
treble) balance (Left/Right) processors with stereo
SRS and voice canceller for quality audio applica-
tions in car radio, Hi-Fi, TV systems.
It reproduces SRS (Sound Retrieval System)
sound by external components and surround
sound by using phase shifters and a signal ma-
trix. The AC signal setting is obtained by resistor
networks and switches combined with operational
amplifiers according to the SRS laboratories
specification. Control of all the functions is ac-
complished by serial bus.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.
February 1998
ORDERING NUMBER: TDA7464
TQFP44
1
2
3
5
6
4
7
8
9
10
17
11
18 19 20 21 22
44 43 42 41
39
40
38 37 36 35 34
28
27
26
24
23
25
33
32
31
29
30
VAR_L
NETW2
NETW1
HP1
LP1
HP2
BASS_LI
BASS_LO
BASSO_R
BASSO_L
VAR_R
BASS_RO
BASS_RI
MIDDLE_LO
MIDDLE_LI
MIDDLE_RI
MIDDLE_RO
TREBLE_R
TREBLE_L
AGND
SDA
SCL
LP
PS1
PS2
PS3
V
S
PS4
CREF
R_IN4
R_IN3
R_IN2
LPVC
L_IN4
RECOUT_L
RECOUT_R
R_OUT
DIG_GND
L_OUT
R_IN1
L_IN1
L_IN2
L_IN3
VREFOUT
D96AU483C
12 13 14 15 16
PIN CONNECTION
The Device incorporates the SRS
(Sound Retrieval System) under
licence from SRS Labs, Inc.
1/21
L-IN1
RLP1
L-R
0.22
F
SUPPLY
V
S
AGND
CREF
TREBLE
18nF
MIDDLE
2.7K
MIDDLE-LI
MIDDLE-LO
22nF
RM
BASS
BASS-LI
MUTE
D96AU481D
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
RECOUT-R
L-OUT
RECOUT-L
22
F
+
-
+
-
+
RHP1
LP1
HP1
HP2
5.6nF
680nF
-
+
R6
R5
PS1
90Hz
100nF
PS1
RPS1
SIM
MOVIE/
MUSIC
MUSIC
PS2
4KHz
PS3
400Hz
PS4
400Hz
4.7nF
PS2
RPS2
22nF
PS3
RPS3
22nF
PS4
RPS4
MOVIE/
SIM
MIXING
AMP
LPF
9KHz
EFFECT
CONTROL
MIXING
AMP
1.2nF
LP
MIDDLE-RI
MIDDLE-RO
31
12
3
4
3
4
2
4
1
4
0
39
20
38
44
15
14
11
25
17
16
13
27
22
21
23
24
26
+
-
+
LPF
100nF
LPVC
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
10
7
6
8
9
12
18
34
19
0.22
F
31.5dB
control
R-IN4
31.5dB
control
0.47
F
NETW1
NETW2
37
54
VOICE
ON
SURR
SRS
SURR
REAR
FIX
3BAND
SURR
REAR
FIX
3BAND
FIX
VAR
RB
FIX
VAR
50K
50K
STEREO
SRS
CENTER
SPACE
1K
4.42K
0.47
F
1.5K
32.4K
130K
47.5K
4.7nF
3.74K
VREFOUT
32
RM
RB
V
REF
OFF
FIX
SURR
SRS
FIX
+
+
100K
MIX
SW
MIX
SW
N.B.
SW
N.B.
SW
L-IN2
0.22
F
30
50K
L-IN3
0.22
F
29
50K
L-IN4
0.22
F
28
50K
0.22
F
R-IN3
36
50K
0.22
F
R-IN2
35
50K
0.22
F
R-IN1
33
50K
BLOCK DIAGRAM
TDA7464
2/21
THERMAL DATA
Symbol
Description
Value
Unit
R
th j-pins
Thermal Resistance Junction-pins
Ma x.
85
C/W
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
Input Attenuation Control (0.5dB)
-31.5
0
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 (L
CH,
R
CH
)
-79
0
dB
Mute Attenuation
100
dB
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
ELECTRICAL CHARACTERISTICS (refer to the test circuit T
amb
= 25
C, 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
25
mA
SVR
Ripple Rejection
L
CH
/ R
CH out
, Mode = OFF
60
80
dB
INPUT STAGE
R
IN
Input Resistance
37.5
50
62.5
K
V
CL
Clipping Level
THD = 0.3%
2
2.5
Vrms
A
RANGE
Attenuation 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
-1
0.5
1
dB
V
DC
DC Steps
Adjacent att. step
-3
0
3
mV
A
VO1
Voice Canceller Output 1
L
IN
= R
IN
, R
IN
= ON,
V
mix
= 0V FIX, 0dB attenuation
5
6
7
dB
A
VO2
Voice Canceller Output 2
L
IN
= R
IN
= 0V V
mix
= 1V
rms
FIX,
0dB attenuation
-1
0
1
dB
TDA7464
3/21
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
SUPPLY
A
VO3
Voice Canceller Output 3
L
IN
= -R
IN
, V
mix
= 0V FIX,
0dB attenuation
5
6
7
dB
R
LPV
Low Pass Filter Resistance
24
32
40
K
BASS CONTROL
Gb
Control Range
Max. Boost/cut
+12.0
+14.0
+16.0
dB
B
STEP
Step Resolution
1
2
3
dB
R
B
Internal Feedback Resistance
33
44
55
K
MIDDLE CONTROL
Gm
Control Range
Max. Boost/cut
+12.0
+14.0
+16.0
dB
M
STEP
Step Resolution
1
2
3
dB
R
M
Internal Feedback Resistance
18.75
25
31.25
K
TREBLE CONTROL
Gt
Control Range
Max. Boost/cut
+13.0
+14.0
+15.0
dB
T
STEP
Step Resolution
1
2
3
dB
STANDARD 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
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
out
-1
0
1
dB
G
MOV
In-phase Gain (Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
p-p
R
in
R
out
, L
in
L
out
8
dB
D
GMOV
LR In-phase Gain Difference
(Movie)
Movie mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V
p-p
(R
in
R
out
) (L
in
L
out
)
0
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
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
L
ou t
4.5
dB
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
L
ou t
4.0
dB
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
L
ou t
7.0
dB
TDA7464
4/21
ELECTRICAL CHARACTERISTICS (continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
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
R
out
4.5
dB
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
R
out
3.8
dB
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
R
out
20
dB
R
LP1
Low Pass Filter Resistance
7.5
10
12.5
K
R
HPI
High Pass Filter Resistance
45
60
75
K
R
LPF
LP Pin Impedance
7.5
10
12.5
K
STANDARD SURROUND SOUND EFFECT CONTROL
C
RANGE
Control Range
- 21
- 6
dB
S
STEP
Step Resolution
1
dB
SURROUND SOUND MATRIX PHASE
R
PS10
Phase Shifter 1: D1 = 0, D0 = 0
8.8
11.8
14.8
K
R
PS11
Phase Shifter 1: D1 = 0, D0 = 1
10.6
14.1
17.6
K
R
PS12
Phase Shifter 1: D1 = 1, D0 = 0
13.4
17.9
22.4
K
R
PS13
Phase Shifter 1: D1 = 1, D0 = 1
28
37.3
46.6
K
R
PS20
Phase Shifter 2: D3 = 0, D2 = 0
4.2
5.6
7
K
R
PS21
Phase Shifter 2: D3 = 0, D2 = 1
5.1
6.8
8.5
K
R
PS22
Phase Shifter 2: D3 = 1, D2 = 0
6.3
8.4
10.5
K
R
PS23
Phase Shifter 2: D3 = 1, D2 = 1
13.7
18.3
22.9
K
R
PS30
Phase Shifter 3: D5 = 0, D4 = 0
9
12.1
15.1
K
R
PS31
Phase Shifter 3: D5 = 0, D4 = 1
10.9
14.5
18.1
K
R
PS32
Phase Shifter 3: D5 = 1, D4 = 0
13.6
18.1
22.6
K
R
PS33
Phase Shifter 3: D5 = 1, D4 = 1
29.3
39.1
48.9
K
R
PS40
Phase Shifter 4: D7 = 0, D6 = 0
9
12.1
15.1
K
R
PS41
Phase Shifter 4: D7 = 0, D6 = 1
10.9
14.5
18.1
K
R
PS42
Phase Shifter 4: D7 = 1, D6 = 0
13.6
18.1
22.6
K
R
PS43
Phase Shifter 4: D7 = 1, D6 = 1
29.3
39.1
48.9
K
SRS SURROUND SOUND MATRIX
CENTER
SRS Control Range
-31
0
dB
Step
C
Center Step Resolution
1
dB
SPACE
SRS Space Control Range
-31
0
dB
Step
S
Space Step Resolution
1
dB
P
ERSP1
Perspective 1
Input Signal of 125Hz
SPACE = 0dB, CENTER = MUTE
R
in
= GND; Li
n
R
OUT
12
dB
P
ERSP2
Perspective 2
Input Signal of 2.15KHz
SPACE = 0dB, CENTER = MUTE
R
in
= GND; Li
n
R
OUT
0
dB
L+R
L+ R SRS Curve
SPACE = MUTE, CENTER =0dB
R
in
= GND; Li
n
R
OUT
-8.5
dB
L, R
L, R SRS Curve
SPACE = MUTE,
CENTER = MUTE
R
in
= GND; Li
n
L
OUT
L
in
= GND; Ri
n
R
OUT
-13.4
dB
TDA7464
5/21