TDA7466.pdf

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DIGITALLY CONTROLLED AUDIO PROCESSOR WITH SRS SURROUND SOUND AND VOICE CANCELLER
TDA7466
DIGITALLY CONTROLLED AUDIO PROCESSOR WITH
SRS SURROUND SOUND AND VOICE CANCELLER
TheDevice incorporatesthe SRS
(Sound Retrieval System) under
licencefromSRSLabs,Inc.
1 STEREO INPUT
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
- AVAILABILITY OF LOUDSPEAKERS
EQUALIZATION FIXED BY EXTERNAL
COMPONENTS
- 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
SDIP42
ORDERING NUMBER: TDA7466
PIN CONNECTION
V S
PS4
PS3
PS2
PS1
1
42
41
40
39
38
CREF
2
NBRO
3
NBRIN
4
5
6
7
8
9
LPVC
R_IN
LP
LP1
HP1
HP2
VAR_L
37
36
35
34
33
VREFOUT
L_IN
NBLIN
NBLO
10
11
12
13
14
NETW2
NETW1
BASSO_L
32
VAR_R
31
RECOUT_L
BASSO_R
BASS_LO
30
29
RECOUT_R
L_OUT
BASS_LI
BASS_RO
BASS_RI
15
16
28
27
26
R_OUT
DIG_GND
17
18
19
20
21
SCL
SDA
MIDDLE_LO
25
DESCRIPTION
The TDA7466 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-
MIDDLE_LI
24
AGND
MIDDLE_RO
MIDDLE_RI
23
22
TREBLE_L
TREBLE_R
D96AU445A
complished by serial bus.
Thanks to the used BIPOLAR/CMOS Technology,
Low Distortion, Low Noise and DC stepping are
obtained.
May 1997
1/21
90960427.002.png
2.7K
5.6K
NB1
5.6nF
18nF
22nF
100nF
100nF
5.6nF
680nF
100nF
4.7nF
22nF
22nF
NB-LA
NB-LB
2.2 m F
NB2
NBLIN
LP1
HP1 HP2
PS1
PS2
PS3
PS4
TREBLE-L
BASS-LI
BASS-LO
BASSO-L
VAR-L
NBLO
7
8
9
5
4
3
2
23
19
18
15
14
11 10
35
34
31.5dB control
0.22
m
F
MIX SW
36
RPS1
RPS2
RPS3
RPS4
RM
RB
FIX
30K
L-IN
+
50K
RLP1
RHP1
PS1
90Hz
PS2
4KHz
PS3
400Hz
PS4
400Hz
31
RECOUT-L
79dB CONTROL
FIX
R5
MUSIC
SURR
REC
ATT
79dB CONTROL
MOVIE/
SIM
R6
SRS
SPKR
ATT
VAR
-
SURR
29
-
+
OFF
REAR
+
L-OUT
-
+
SIM
MUTE
FIX
MUTE
MIXING
AMP
3BAND
TREBLE
MIDDLE
BASS
MOVIE/
MUSIC
-
+
26
25
27
+
L-R
SCL
SDA
DIG_GND
I 2 C BUS DECODER + LATCHES
+
LPF
9KHz
EFFECT
CONTROL
MIXING
AMP
TREBLE
MIDDLE
BASS
79dB CONTROL
-
FIX
FIX
SURR
SPKR
ATT
+
-
28
3BAND
VAR
R-OUT
VOICE
ON
FIX
MUTE
0.22
m
F
LPF
+
REC
ATT
38
REAR
+
30
R-IN
RECOUT-R
SURR
50K
31.5dB
control
V REF
MUTE
SUPPLY
STEREO
SRS
100K
100K
30K
CENTER
SPACE
RM
RB
39
1
24
42
37
6
32
33
22
21
20
17
16
79dB CONTROL
13
12
40
41
LPVC
V S
LP
NETW1
NETW2
TREBLE-R
BASS-RO
BASSO-R
VAR-R
NBRIN
NBRO
1K
D96AU446B
100nF
22
m
F
1.2nF
0.47
m
F
130K
2.2
m
F
NB3
18nF 22nF
2.7K
100nF
100nF
NB-RA
NB-RB
5.6nF
5.6K
4.42K
1.5K
32.4K
47.5K
4.7nF
NB4
0.47
m
F
3.74K
90960427.003.png
TDA7466
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
10.2
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
,
V in = 1Vrms; R G = 600 W , all controls flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF; f = 1KHz
unless otherwise specified)
°
C, V S = 9V, R L = 10K
W
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
W
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 =0VV mix =1V rms FIX,
0dB attenuation
-1
0
1
dB
3/21
ELECTRICAL CHARACTERISTICS (refer to the test circuit T amb =25
90960427.004.png
TDA7466
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
W
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
W
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
W
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
-1
0
1
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
0
1
dB
"
R out ,L in
"
L out
G MOV
In-phase Gain (Movie)
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 Difference
(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 MUS
In-phase Gain (Music)
Music mode, Effect Ctrl = -6dB
Input signal of 1kHz, 1.4 V p-p
(R in
7
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 out
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 out
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 out
4/21
90960427.005.png
TDA7466
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
– 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 HPI
High Pass Filter Resistance
45
60
75
K
W
R LPF
LP Pin Impedance
7.5
10
12.5
K
W
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
W
R PS11
Phase Shifter 1: D1 = 0, D0 = 1
10.6
14.1
17.6
K
W
R PS12
Phase Shifter 1: D1 = 1, D0 = 0
13.4
17.9
22.4
K
W
R PS13
Phase Shifter 1: D1 = 1, D0 = 1
28
37.3
46.6
K
W
R PS20
Phase Shifter 2: D3 = 0, D2 = 0
4.2
5.6
7
K
W
R PS21
Phase Shifter 2: D3 = 0, D2 = 1
5.1
6.8
8.5
K
W
R PS22
Phase Shifter 2: D3 = 1, D2 = 0
6.3
8.4
10.5
K
W
R PS23
Phase Shifter 2: D3 = 1, D2 = 1
13.7
18.3
22.9
K
W
R PS30
Phase Shifter 3: D5 = 0, D4 = 0
9
12.1
15.1
K
W
R PS31
Phase Shifter 3: D5 = 0, D4 = 1
10.9
14.5
18.1
K
W
R PS32
Phase Shifter 3: D5 = 1, D4 = 0
13.6
18.1
22.6
K
W
R PS33
Phase Shifter 3: D5 = 1, D4 = 1
29.3
39.1
48.9
K
W
R PS40
Phase Shifter 4: D7 = 0, D6 = 0
9
12.1
15.1
K
W
R PS41
Phase Shifter 4: D7 = 0, D6 = 1
10.9
14.5
18.1
K
W
R PS42
Phase Shifter 4: D7 = 1, D6 = 0
13.6
18.1
22.6
K
W
R PS43
Phase Shifter 4: D7 = 1, D6 = 1
29.3
39.1
48.9
K
W
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
12
dB
"
R OUT
P ERSP2
Perspective 2
Input Signal of 2.15KHz
SPACE = 0dB, CENTER = MUTE
R in = GND; Li n
0
dB
"
R OUT
L+R
L+ R SRS Curve
SPACE = MUTE, CENTER
=0dB
R in = GND; Li n
-8.5
dB
"
R OUT
5/21
90960427.001.png

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