TDA7448 데이터 시트보기 (PDF) - STMicroelectronics
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TDA7448 Datasheet PDF : 14 Pages
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TDA7448
Figure 4. Test circuit
0.47µF
IN1 2
IN1
VOLUME
50K
0.47µF
IN2 19
IN2
VOLUME
0.47µF
IN3 3
IN3
50K
VOLUME
50K
0.47µF
IN4 18
IN4
VOLUME
0.47µF
IN5 4
IN5
50K
VOLUME
50K
0.47µF
IN6 17
IN6
VOLUME
50K
11
GND
CREF 20
10µF
SUPPLY
1
VS
I2C BUS
DECODER
7
OUT1
14
OUT2
6
OUT3
15
OUT4
5
OUT5
16
OUT6
10
SCL
9
SDA
11
ADDR
D02AU1406
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.
Figure 6. THD vs. RLOAD
3.1 CREF
The suggested 10µF reference capacitor (CREF)
value can be reduced to 4.7µF if the application re-
quires faster power ON.
Figure 5. THD vs. frequency
Figure 7. Channel separation vs. frequency
4/14
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