TDA7448

4/13

Figure 1. Test circuit

APPLICATION SUGGESTIONS

The volume control range is 0 to -79dB, by 1dB step

resolution.

The very high resolution allows the implementation of

systems free from any noise acoustical effect.

CREF

The suggested 10

µF reference capacitor (CREF)

value can be reduced to 4.7

µF if the application re-

quires faster power ON.

Figure 2. THD vs. frequency

Figure 4. Channel separation vs. frequency

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

VOLUME

I

2

C BUS

DECODER

SUPPLY

2

IN1

0.47

µF

0.47

µF

0.47

µF

0.47

µF

0.47

µF

0.47

µF

10

µF

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

SDA

SCL

ADDR

D02AU1406

IN2

IN3

IN4

IN5

IN6

IN1

IN2

IN3

IN4

IN5

IN6

11

9

10

16

5

15

6

14

7

GND

CREF

19

3

18

4

17

11

20

1

50K

50K

50K

50K

50K

50K