SGS Thomson Microelectronics TDA7467D, TDA7467 Datasheet

AUDIO MATRIX WITH SRS EFFECTS

The Device incorporates the SRS
(Sound Retrieval System) under
licencefromSRS Labs,Inc.

1 STEREOINPUT
INPUT ATTENUATION CONTROL IN 0.5dB

STEP

- MUTE FUNCTION
MONOMODE (SRS3D MONO)
STEREOMODE (SRS3D STEREO)
SPACE AND CENTER ATTENUATORS ARE

AVAILABLE
ALL FUNCTION ARE PROGRAMMABLE VIA

SERIALBUS (I

2

C BUS)

TDA7467

DIP28

ORDERING NUMBER: TDA7467

DESCRIPTION

The TDA7467is a SRS(Sound Retrieval System)
audio matrix. It reproduces SRS sound process­ing stereo and mono sourcesboth.

The SRS sound is guaranteed by external com­ponents and it is not affected by internal process
spreads.

The AC signal setting is obtained by resistor net­works and switches combined with operational
amplifiers according to the SRS labs specifica-

PIN CONNECTION(Topview)

LOUT

RIN

LIN

DIG_GND

SCL HP6

ADDR

SDA

AGND

PS1
PS2
PS3
PS4
PS5
PS6

1
2
3
4
5
6
7
8
9
10
11
12
13
14

SO28

ORDERING NUMBER: TDA7467D

tion.
Controlofall thefunctionsisaccomplishedbyserial

bus. Thanks to the used BIPOLAR/CMOS/DMOS
technology, Low Distortion, Low Noise and DC
stepping are obtained.

28
27
26
25
24

22
21
20
19
18
17
16
15

D96AU507

ROUT
CREF
LP2
LP1

HP523
HP4
V

S

HP3
HP2
HP1
VREFOUT
NETW2
NETW1

May 1997

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TDA7467

BLOCK DIAGRAM

1

L-OUT

SCL

576

SDA

ADDR

4

DIG_GND

R-OUT

2

D96AU506

C BUS DECODER + LATCHES

2

I

MONO

+

FIX

SRS

MONO

+

SPACE

4.7nF

3.74K

0.47µF

22µF

CREF

AGND

130K

VREFOUT

47.5K

0.47µF

1.5K 32.4K

4.42K

NETW2NETW1

CENTER

1K

15 16

REF

V

SRS

17

-

SUPPLY

MONO

SRS

+

MIX

+

+

+

MIX

-

PHASE SHIFTER 1

PHASE SHIFTER 2

+

FIX

LP1 LP2

LPF1

1µF 0.1µF

HP6

0.1µF
HP5

HPF2

27nF 4.7nF 0.47nF

2.2nF

15nF

100nF

HP4

HP3

HP2

HP1

PS2 PS3

PS1

PS6

PS5

PS4

23

22 24

HPF1

19

18 20

12 13 14 9 10 11 25 26

1µF

0.1µF

1µF

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31.5dB control

0.15µF

S

V

21 8 27

31.5dB

control

50K

3

L-IN

50K

2

R-IN

0.15µF

TDA7467

THERMAL DATA

Symbol Description Value Unit

R

thj-pins

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

T

amb

T

QUICK REFERENCEDATA

Symbol Parameter Min. Typ. Max. Unit

V

V

THD Total Harmonic DistortionV = 1Vrms f = 1KHz 0.01 0.1 %

S/N Signal to Noise Ratio V

S

Thermal Resistance Junction-pins Max. 85 °C/W

Operating Supply Voltage 11 V

S

Operating Ambient Temperature -10 to 85 °C
Storage Temperature Range -55 to +150 °C

stg

Supply Voltage 7 9 10.2 V

S

CL

Max. input signal handling 2 Vrms

= 1Vrms (mode = OFF) 106 dB

out

Channel Separation f = 1KHz 90 dB

C

Input Control (0.5dB) -31.5 0 dB
SRS Center Control(1dB step) -31 0 dB
SRS Space Control(1dB step) -31 0 dB
Mute Attenuation 100 dB

ELECTRICALCHARACTERISTICS (referto the test circuit T
V

= 1Vrms;RG= 600Ω, allcontrols flat (G = 0dB), Effect Ctrl = -6dB, MODE = OFF;f = 1KHz

in

=25°C, VS= 9V, RL= 10KΩ,

amb

unless otherwisespecified)

Symbol Parameter Test Condition Min. Typ. Max. Unit

SUPPLY

V

S

I

S

SVR Ripple Rejection L

Supply Voltage 7 9 10.2 V
Supply Current 25 mA

CH/RCH out

, Mode = OFF 60 80 dB

INPUTSTAGE

A

A

A

R

IN

V

CL

VMIN

VMAX

STEP

V

DC

Input Resistance 37.5 50 62.5 K
Clipping Level THD = 0.3% 2 2.5 Vrms
Min. Attenuation -1 0 1 dB
Max. Attenuation 31 31.5 32 dB
Step Resolution -1 0.5 1 dB
DC Steps Adjacent att. step -3 0 3 mV

SRS EFFECT CONTROL

C

range1

Sstep1 Center/SpaceStep Resolution 1 dB

Center/Space Control Range -31 0 dB

Ω

3/11

TDA7467

ELECTRICALCHARACTERISTICS (continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

AUDIO OUTPUTS

N

N

o(Off)

o(srs)

Output Noise(OFF) Output muted, Flat

BW (20Hz to 20KHz)

Output noise(srs)

BW (20Hz to 20KHz) 50 µVrms

4
5

Surround Sound

d Distortion A

S

C

V

ocl

R

out

V

out

Channel Separation 90 dB
Clipping Level d = 0.3% 2 2.5 Vrms
Output Resistance 30 Ω
DC Voltage Level 3.8 V

=0;Vin= 1Vrms 0.01 0.1 %

V

BUS INPUTS

V

il

V

ih

I

in

V

o

Input Low Voltage 1V
Input High Voltage 3 V
Input Current -5 5 µA
Output VoltageSDA

IO=1.6mA 0.4 V

Acknowledge

SRS SURROUNDSOUND MATRIX

CENTER SRS Control Range -31 0 dB

Step

SPACE SRS Space Control Range -31 0 dB

Step

P

ERSP1

P

ERSP2

L+R L+ R SRS Curve SPACE= MUTE,CENTER=0dB

L, R L, R SRS Curve SPACE= MUTE,CENTER=0dB

Center Step Resolution 1 dB

C

Space Step Resolution 1 dB

S

Perspective 1 Input Signal of 125Hz

12 dB
SPACE= 0dB,CENTER= MUTE
R

= GND; Li

in

Perspective 2 Input Signal of 2.15KHz

n →ROUT

0dB
SPACE= 0dB,CENTER= MUTE
R

= GND; Li

in

n →ROUT

-8.5 dB

R

in = GND; Lin → ROUT

-13.4 dB

R

= GND; Li

in

Lin= GND; Rin→ R

n →LOUT

OUT

Vrms

µ
µVrms

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