TDA7442 Datasheet TDA7442D013TR, TDA7442D, TDA7442 | P1-P3

1/17

TDA7442

TDA7442D

June 2004

1FEATURES

■ 4 STEREO INPUTS

■ INPUT ATTENUATION CONTROL IN 0.5dB

STEP

■ TREBLE AND BASS CONTROL

■ TWO SURROUND MODE AVAILABLE WITH 4

SELECTABLE RESPONSES:

–MUSIC

– SIMULATED STEREO

■ TWO SPEAKER ATTENUATORS:

– 2 INDEPENDENT SPEAKER CONTROLS IN

1dB STEPS FOR BALANCE FACILITY

– INDEPENDENT MUTE FUNCTION

■ ALL FUNCTIONS PROGRAMMABLE VIA

SERIAL BUS

■ 2 MONITOR OUTPUT (ONLY FOR TDA7442)

2DESCRIPTION

The TDA7442/42D is volume tone (bass and tre-

ble) balance (Left/Right) processors for quality au-

dio applications in TV and Hi-Fi systems.

It reproduces surround sound by using a program-

mable phase shifter. 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 BIPOLAR/CMOS Technology used,

Low Distortion, Low Noise and DC stepping are

obtained.

TONE CONTROL AND SURROUND

DIGITALLY CONTROLLED AUDIO PROCESSOR

Figure 2. Pin Connections (Top views)

L_IN3

L_IN4

MUXOUTL

IN(L)

MUXOUT(R)

BIN(R)

IN(R)

BOUT(R)

BIN(L)

1

3

2

4

5

6

7

8

9

BOUT(L)

LP

PS1

TREBLE(R)

TREBLE(L)

SCL

SDA

DIG-GND

CREF23

22

21

20

19

17

18

16

15

D98AU948

10

11

12

13

14

28

27

26

25

24

R_IN3

R_IN2

R_IN1

L_IN1

L_IN2 V

S

AGND

ROUT

LOUT

R_IN4

L-IN2

L-IN3

L-IN4

MUXOUT(L)

IN(L)

N.C.

MUXOUT(R)

IN(R)

BIN(R)

1

3

2

4

5

6

7

8

9

PS1

TREBLE-

L

N.C.

DIGGND

TREBLE-

R

SCL

SDA

CREF

V

S

27

26

25

24

23

21

22

20

19

D01AU1247

10

11

12

13

14

32

31

30

29

28

R-IN2

R-IN1

MONITOR(L)

M

ONITOR(R)

L-IN1 AGND

R-OUT

L-OUT

R-IN4

R-IN3

BIN(L)

BOUT(L)17

16

BOUT(R)

LP18

15

SO28

SDIP32

Figure 1. Packages

T

able 1. Order Codes

Part Number Package

TDA7442 SDIP-32

TDA7442D SO-28

TDA7442D013TR Tape & Reel

SO-28

SDIP-32

REV. 2

TDA7442 - TDA7442D

2/17

Figure 3. Block Diagram (TDA7442)

Figure 4. Block Diagram (TDA7442D)

L-IN1

5

6

7

8

2

1

32

31

4 1113 1827 2826 22 14 13

29

23

25

24

30

171620193109

L-R

0.47µF

SUPPLY

V

S

AGND

CREF

TREBLE

BASS

BIN(L)

MUTE

D98AU947B

I

2

C BUS DECODER + LATCHES

SPKR

ATT

TREBLE

BASS

5.6nF

MUTE

SPKR

ATT

SCL

SDA

DIG GN

D

ROUT

LOUT

22µF

+

-

+

-

+

R-IN4

0.47µF

50K

PS1

90Hz

100nF

PS1

RPS1

SYMULATED

MUSIC

MUSIC/

SYMULATED

OFF

MIXING

AMP

LPF

9KHz

EFFECT

CONTROL

MIXING

AMP

1.2nF

LP

TREBLE-R

5.6nF

TREBLE-L

100nF

5.6K

100nF

BOUT(L)

100nF 100nF

5.6K

BIN(R) BOUT(R)

79dB CONTROL

+

-

+

-

79dB CONTROL

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

31.5dB

control

R-IN3

R-IN2

R-IN1

31.5dB

control

L-IN2

L-IN3

L-IN4

Vref

OFF

SURR

OFF

SURR

RB

FIX

VAR

RB

FIX

VAR

L+R

30K

2.2µF

MUXOUT(R)

IN(R)

MONITOR(L)

MONITOR(R)

MUXOUT(L)

IN(L)

L-IN1

4

5

6

7

3

2

1

28

10 11 16 24 25 23 19 12 13

26

20

22

21

27

1514181798

L-R

0.47µF

SUPPLY

V

S

AGND

CREF

TREBLE

BASS

BIN(L)

MUTE

D01AU1248

I

2

C BUS DECODER + LATCHES

SPKR

ATT

TREBLE

BASS

5.6nF

MUTE

SPKR

ATT

SCL

SDA

DIG GN

D

ROUT

LOUT

22µF

+

-

+

-

+

R-IN4

0.47µF

50K

PS1

90Hz

100nF

PS1

RPS1

SYMULATED

MUSIC

MUSIC/

SYMULATED

OFF

MIXING

AMP

LPF

9KHz

EFFECT

CONTROL

MIXING

AMP

1.2nF

LP

TREBLE-R

5.6nF

TREBLE-L

100nF

5.6K

100nF

BOUT(L)

100nF 100nF

5.6K

BIN(R) BOUT(R)

79dB CONTROL

+

-

+

-

79dB CONTROL

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

0.47µF

50K

31.5dB

control

R-IN3

R-IN2

R-IN1

31.5dB

control

L-IN2

L-IN3

L-IN4

Vref

OFF

SURR

OFF

SURR

RB

FIX

VAR

RB

FIX

VAR

L+R

30K

2.2µF

MUXOUT(R)

IN(R)

MUXOUT(L)

IN(L)

3/17

TDA7442 - TDA7442D

Table 2. Quick Reference Data

Table 3. Thermal Data

Table 4. Absolute Maximum Ratings

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

Treble 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

Symbol Parameter Value Unit

R

th j-pins

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

Symbol Parameter Value Unit

V

S

Operating Supply Voltage 11 V

T

amb

Operating Ambient Temperature -10 to 70 °C

T

stg

Storage Temperature Range -55 to +150 °C

Table 5. Electrical Characteristics

Refer to the test circuit T

amb

= 25°C, V

S

= 9V, R

L

= 10KΩ, V

in

= 1Vrms; R

G

= 600Ω, 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 10 18 26 mA

SVR Ripple Rejection

L

CH

/ R

CH out

, Mode = OFF

60 80 dB

INPUT STAGE

R

IN

Input Resistance 35 50 65 KΩ

V

CL

Clipping Level THD = 0.3% 2 2.5 Vrms

C

RANGE

Control Range 31.5 dB

AV

MIN

Min. Attenuation -1 0 1 dB

A

VMAX

Max. Attenuation 31 31.5 32 dB

A

STEP

Step Resolution 0.5 1 dB

BASS CONTROL

G

b

Control Range Max. Boost/cut ±11.5 ±14.0 ±16.0 dB

B

STEP

Step Resolution 1 2 3 dB

R

B

Internal Feedback Resistance 32 44 56 KΩ

TDA7442

TDA7442

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