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TDA7429L

3 BAND EQUALIZER AUDIO PROCESSOR

WITH SUBWOOFER CONTROL

s

s

s

3 STEREO INPUTS

AUXILIARY MONO INPUT

INPUT ATTENUATION CONTROL IN 0.5dB

STEP

TREBLE MIDDLE AND BASS CONTROL

FOUR SPEAKERS ATTENUATORS:

- 4 INDEPENDENT SPEAKERS CONTROL IN

1dB STEPS FOR BALANCE FACILITY

- INDEPENDENT MUTE FUNCTION

SUBWOOFER OUTPUT (L+R) CONTROLLED

IN 1dB STEP INPUTS

ALL FUNCTIONS PROGRAMMABLE VIA

SERIAL BUS

an additional subwoofer control.

The AC signal setting is obtained by resistor networks

and switches combined with operational amplifiers.

Thanks to the used BIPOLAR/CMOS Technology,

Low Distortion, Low Noise and DC stepping are ob-

tained.

SDIP42

ORDERING NUMBER:

TDA7429L

s

s

s

s

DESCRIPTION

The TDA7429L is volume tone (bass middle and tre-

ble) balance (Left/Right) processors for quality audio

applications in TV and Hi-Fi systems, providing also

Figure 1. Test Circuit

2.2碌F

2.2碌F

0.47碌F

BASSO_R

L+R OUTPUT

N.C.

N.C.

N.C.

N.C.

N.C.

LP

100nF

9

1

2

3

4

7

5

34

33

42

35

14

VAR_R

13

BASSO_L

12

VAR_L

11

MONO INPUT

10

0.47碌F

R_IN3

40

0.47碌F

R_IN2

39

38

36

R_IN1

0.47碌F

MONITOR_L

L_IN1

0.47碌F

L_IN2

L_IN3

V

S

10碌F

0.47碌F

0.47碌F

LP1

6

100nF

5.6nF

100nF

TREBLE_R

TREBLE_L

23

24

41

8

37

15

19

20

16

HP2

BASS_LO

CREF

22碌F

220nF

100nF

100nF

MONITOR_R

22nF

18nF

MIDDLE_LI

22nF

MIDDLE_RO

MIDDLE_RI

21

22

32

31

30

29

R_OUT

28

27

26

SDA

25

AGND

MIDDLE_LO

100nF

BASS_LI

100nF

2.7K

5.6K

17

BASS_RO

18nF

2.7K

100nF

18

BASS_RI

5.6K

AUXOUT_L AUXOUT_R L_OUT

DIG_GND SCL

D99AU1029

March 2000

1/16

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