1/16

TDA7429L

March 2000

s

3 STEREO INPUTS

s

AUXILIARY MONO INPUT

s

INPUT ATTENUATION CONTROL IN 0.5dB

STEP

s

TREBLE MIDDLE AND BASS CONTROL

s

FOUR SPEAKERS ATTENUATORS:

- 4 INDEPENDENT SPEAKERS CONTROL IN

1dB STEPS FOR BALANCE FACILITY

- INDEPENDENT MUTE FUNCTION

s

SUBWOOFER OUTPUT (L+R) CONTROLLED

IN 1dB STEP INPUTS

s

ALL FUNCTIONS PROGRAMMABLE VIA

SERIAL BUS

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

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

3 BAND EQUALIZER AUDIO PROCESSOR

WITH SUBWOOFER CONTROL

Figure 1. Test Circuit

N.C.

N.C.

N.C.

N.C.

N.C.

LP

LP1

100nF

VAR_L

2.2

µF

HP2

BASSO_L

VAR_R

BASSO_R

AUXOUT_L AUXOUT_R L_OUT

R_OUT

CREF

100nF

10

µF

22

µF

220nF

R_IN3

0.47

µF

R_IN2

0.47

µF

DIG_GND

SCL

SDA

AGND

18nF

2.7K

MIDDLE_LO

MIDDLE_LI

22nF

18nF

2.7K

MIDDLE_RO

MIDDLE_RI

22nF

100nF

5.6K

BASS_LO

BASS_LI

100nF

100nF

5.6K

BASS_RO

BASS_RI

100nF

TREBLE_L

5.6nF

D99AU1029

2.2

µF

TREBLE_R

100nF

MONITOR_R

100nF

42

1

14

2

3

4

5

6

23

24

37

19

20

21

22

41

15

16

17

18

32

31

30

29

28

27

26

25

13

12

11

8

7

40

39

MONO INPUT

0.47

µF

L+R OUTPUT

9

10

R_IN1

0.47

µF

38

L_IN1

0.47

µF

35

L_IN2

0.47

µF

34

L_IN3

0.47

µF

33

MONITOR_L

36