SGS Thomson Microelectronics TDA7346D, TDA7346 Datasheet

DIGITAL CONTROLLED SURROUNDSOUND MATRIX

1 STEREOINPUT THREEINDEPENDENT SURROUND MODES

ARE AVAILABLE MOVIE, MUSIC AND SIMULATED

- MUSIC:4 SELECTABLERESPONSES

- MOVIE ANDSIMULATED: 256SELECTABLERESPONSES

TWO INDEPENDENT INPUT ATTENUATORS IN 0.31dB FORBALANCEFACILITY

ALL FUNCTIONS PROGRAMMABLE VIA SERIAL BUS

SO20

TDA7346

DIP20

DESCRIPTION

The TDA7346 reproduces surround sound by using phase shifters and a signal matrix. Control of all the functionsis accomplishedby serial bus. The AC signal setting is obtained by resistor net-

BLOCK DIAGRAM

5.6nF 680nF

LP1

HP1 HP2

100nF

L

-in 100K

R

-in 100K

RLP1 RHP1

+

R5

-

+

R6

SUPPLY

+

L-R

SIM

MOVIE/ MUSIC

ORDERING NUMBER: TDA7346 (DIP20)

TDA7346D (SO20)

works and switches combined with operational amplifiers.

100nF

PS1

RPS1

PS1

90Hz

LPF

9KHz

4.7nF

PS2

RPS2 RPS3 RPS4

PS2

4KHz

MUSIC

OFF

EFFECT

CONTROL

22nF

PS3

400Hz

PHASESHIFTER

MOVIE/SIM

22nF

PS4

400Hz

MIXING

AMP

MIXING

AMP

I2C

BUS

DECODER

LATCHES

L

out

SCL SDA

DIG GND

ADDR

REAR

R

out

February 1997

VSAGND CREF LP

C5

22µF

1.2nF

D94AU122A

1/14

TDA7346

ABSOLUTE MAXIMUMRATINGS

Symbol Parameter Value Unit

V

T

PIN CONNECTION

Operating Supply Voltage 10.5 V

S

Operating Ambient Temperature -40 to 85 °C

amb

Storage Temperature Range -55 to +150 °C

stg

PS1

V

CREF

L

-in

LP

REAR

L

out

SDA

SCL

1 2

S

3 4 5 6 7 8 9 ADDR

19 18 17 16 15 14 13 12

PS220 LP1 HP1 HP2 R

-in

PS3 PS4 R

out

DIG GND 10 AGND11

D94AU128

THERMAL DATA

Symbol Description Value Unit

R

thj-pins

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

QUICK REFERENCEDATA

Symbol Parameter Min. Typ. Max. Unit

V

CL

THD Total Harmonic Distortion V = 1Vrms f = 1KHz 0.02 0.1 %

S/N Signal to Noise Ratio V

S

2/14

Supply Voltage 7 9 10.2 V

S

Max. input signal handling 2 Vrms

out = 1Vrms (mode = OFF) 106 dB

Channel Separation f= 1KHz 70 dB

C

TEST CIRCUIT

TDA7346

L

out

SCL

SDA

680nF

HP1

18

REAR

6798

C16

17

L

-in 4

0.1µF

C17

V

HP2

S

10µFC1

2

TDA7346

100nF

C2

PS3

22nF

15

C4

PS4

22nF

C5

ELECTRICALCHARACTERISTICS

R

= 600Ω, all controls flat (G = 0),EffectCtrl = -6dB, MODE = OFF; f = 1KHz

G

14

R

out

AGND DIG GND

(refer to the test circuitT

12101113

ADDR

=25°C, VS= 9V, RL= 10KΩ,

amb

unless otherwisespecified)

LP

5

R

16

LP1

19

PS1

1

PS2

20

CREF

3

D93AU040C

1.2nF C6

0.1µF

-in C7

5.6nF C15

100nF

C14

4.7nF C13

22µF

C3

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 10 mA

CH/RCH out

, Mode = OFF 60 80 dB

INPUT STAGE

C

RANGE

A

V

R

II

V

CL

VMIN

VMAX

STEP

DC

Input Resistance 100 K Clipping Level THD = 0.3%; Lin orRin 2 2.5 Vrms

THD = 0.3%; Rin + Lin (2) 3.0 Vrms Control Range 20 dB Min. Attenuation -1 0 1 dB Max. Attenuation 20 dB Step Resolution 0.31 dB DC Steps adjacent att.step 0 mV

EFFECT CONTROL

C

RANGE

S

STEP

Control Range - 21 - 6 dB Step Resolution 1 dB

Ω

3/14

TDA7346

ELECTRICAL CHARACTERISTICS

(continued)

SURROUNDSOUND MATRIX

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

MOV1

In-phase Gain (Movie 1) RPS1, RPS2, RPS3, RPS4 = POR Preset

G

MOV2

In-phase Gain (Movie 2) RPS1, RPS2, RPS3, RPS4 = POR Preset

D

GMOV

LR In-phase Gain Difference (Movie)

G

MUS1

In-phase Gain (Music 1) RPS1 = POR PRESET

G

MUS2

In-phase Gain (Music 2) RPS1 = POR PRESET

D

GMUS

LR In-phase Gain Difference (Music)

L

MON1

Simulated L Output 1 RPS1, RPS2, RPS3, RPS4 = POR Preset

L

MON2

Simulated L Output 2 RPS1, RPS2, RPS3, RPS4 = POR Preset

L

MON3

Simulated L Output 3 RPS1, RPS2, RPS3, RPS4 = POR Preset

R

MON1

Simulated R Output 1 RPS1, RPS2, RPS3, RPS4 = POR Preset

R

MON2

Simulated R Output 2 RPS1, RPS2, RPS3, RPS4 = POR Preset

R

MON3

Simulated R Output 3 RPS1, RPS2, RPS3, RPS4 = POR Preset

R

LP1

R

PS1

R

PS2

R

PS3

R

PS2

R

HPI

R

LPF

Low Pass Filter Resistance 10 KΩ Phase Shifter 1 Resistance at POR 17.95 kΩ Phase Shifter 2 Resistance at POR 8.465 K Phase Shifter 3 Resistance at POR 18.050 K Phase Shifter 4 Resistance at POR 18.050 KΩ High Pass Filter Resistance 60 KΩ LP Pin Impedance 10 KΩ

1kHz, 1.4 V

L

→

in

out

p-p,Rin

→ R

out

Mode OFF, Input signal of 1kHz, 1.4 V (R

in

→

p-p

R

), (L

out

L

)

→

in

out

Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V Rin→ R

out,Lin

→ L

p-p

out

Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V Rin→ R

out,Lin

→ L

p-p

out

Movie mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V

R

(R

in

→

out

)–(L

→

in

p-p

L

)

out

Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V

R

(R

in

→

out

)–(L

→

in

p-p

L

)

out

Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V Rin→ R

out,Lin

→ L

p-p

out

Music mode, Effect Ctrl = -6dB Input signal of 1kHz, 1.4 V (Rin→ R

)–(Lin→ L

out

p-p

)

SimulatedMode,EffectCtrl=-6dB Input signal of 250Hz,

1.4 V

p-p,Rin

and Lin→ L

out

SimulatedMode,EffectCtrl=-6dB Input signal of 1kHz,

1.4 V

p-p,Rin

and L

L

→

in

out

SimulatedMode, EffectCtrl= 6dB Input signal of 3.6kHz,

1.4 V

p-p,Rin

and L

L

→

in

out

SimulatedMode,EffectCtrl=-6dB Input signal of 250Hz,

1.4 V

p-p,Rin

and L

R

→

in

out

SimulatedMode,EffectCtrl=-6dB Input signal of 1kHz,

1.4 V

p-p,Rin

and Lin→R

out

SimulatedMode,EffectCtrl=-6dB Input signal of 3.6kHz,

1.4 V

p-p,Rin

and Lin→ R

out

-1.5 0 1.5 dB

7dB

8dB

0dB

6dB

7.5 dB

0dB

4.5 dB

– 4.0 dB

7.0 dB

– 4.5 dB

3.8 dB

–20 dB

Ω Ω

4/14

TDA7346

ELECTRICAL CHARACTERISTICS

(continued)

Symbol Parameter Test Condition Min. Typ. Max. Unit

AUDIO OUTPUTS

V

OCL

R

OUT

V

OUT

Clipping Level d = 0.3% 2 2.5 Vrms Output resistance 100 200 300 Ω DC Voltage Level 3.5 3.8 4.1 V

GENERAL

N

O(OFF)

N

O(MOV)

N

O(MUS)

N

O(MON)

d Distorsion Av = 0 ; V

S

C

Output Noise (OFF) BW= 20Hz to 20KHz

R

out

and L

measurement

out

Output Noise (Movie) Mode =Movie ,

B

= 20Hz to 20KHz

W

R

out

andL

measurement

out

Output Noise (Music) Mode = Music ,

B

= 20Hz to 20KHz,

W

R

out

andL

measurement

out

Output Noise (Simulated) Mode = Simulated,

B

= 20Hz to 20KHz

W

R

out

andL

measurement

out

= 1Vrms 0.02 0.1 %

in

8 µVrms

30

30 µVrms

Channel Separation 70 dB

BUS INPUTS

V

IL

V

IH

I

IN

V

O

Note: (1) Bassand Treble response: The center frequency and the resonance quality can be choosen by

the external circuitry. A standard first order bass response can be realized by a standard feedback network.

(2) Thepeak voltage of thetwo input signals must be less then

(Lin + Rin)

Input Low Voltage 1V Input High Voltage 3 V Input Current -5 +5 Output Voltage SDA

IO= 1.6mA 0.4 0.8 V

Acknowledge

V

S

:

2

peak

• A

V

S

<

Vin

2

Vrms

µ

A

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