TDA7448
Figure 1. Test circuit
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
0.47µF
IN1
IN2
IN3
IN4
IN5
IN6
7
14
6
2
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
IN1
IN2
IN3
IN4
IN5
IN6
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
VOLUME
SUPPLY
50K
50K
50K
50K
50K
50K
19
3
15
5
18
4
16
17
10
9
2
SCL
11
20
I
C BUS
GND
DECODER
SDA
CREF
11
ADDR
1
10µF
D02AU1406
VS
APPLICATION SUGGESTIONS
Figure 3. THD vs. R
LOAD
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 10µF reference capacitor (CREF)
value can be reduced to 4.7µF if the application re-
quires faster power ON.
Figure 2. THD vs. frequency
Figure 4. Channel separation vs. frequency
4/13
STMICROELECTRONICS [ ST ]
