Datasheet

TDA7448
4/14
Figure 4. Test circuit
3 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.
3.1 CREF
The suggested 10 µ F reference capacitor (CREF)
value can be reduced to 4.7
µ F if the application re-
quires faster power ON.
Figure 5. THD vs. frequency
Figure 6. THD vs. R
LOAD
Figure 7. Channel separation vs. frequency
VOLUME
V
S
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
I
2
C BUS
DECODER
SUPPLY
2
IN1
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
10µF
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