TDA2320A ST Microelectronics, TDA2320A Datasheet - Page 10

• Manufacturer Part Number: TDA2320A
• Description: STEREO AMPLIFIER
• Manufacturer: ST Microelectronics

TDA2320A
Figure 21 : Fifth Order 3.4kHz Low-pass Butterworth Filter
For f
C1
C1
C2
Figure 22 : Sixth-pole 355Hz Low-pass Filter (Chebychev type)
This is a 6-pole Chebychev type with 0.25dB ripple
in the passband.A decoupling stage is used to avoid
the influence of the input impedance of the filter’s
characteristics.
10/12
0.47 F
c
1st order
= 3.4kHz and R
1.354 .
0.421 .
1.753 .
R
i
56k
C
3
i
2
-
2320A
TDA
1/2
R
R
R
1
1
1
.
.
.
2 f
2 f
2 f
1
1
1
1
R1
i
c
c
c
= R1 = R2 = R3 = R4 = 10k , we obtain :
10k
6.33nF
1.97nF
8.20nF
10k
R2
C1
86.1nF
2nd order
5
6
C2
2320A
-
TDA
1/2
2
3
TDA2320A
-
161nF
1/2
7
10k
1
C3
C4
The attenuation of the filter is 30dB at 6.8kHz and
better than 60dB at 15kHz.
The attenuation is about 55dB at 710Hz and
reaches 80dB at 1065Hz. The in band attenuation
is limited in practice to the 0.25dB ripple and does
not exceed 1/2dB at 0.9f
10k
R3
0.309 .
3.325 .
16.3nF
3
2
2320A
-
TDA
1/2
R
R
1
1
220nF
R4
.
.
2 f
2 f
1
1
1
C3
10k
c
c
c
.
3rd order
1.45nF
15.14nF
C4
10k
5
6
TDA2320A
-
1/2
3.54nF
5
6
2320A
-
TDA
1/2
7
60nF
7