APPLICATION INFORMATION

A typical application is indicated in figure 4, while

the P.C. Board and components layout are re-

ported in figure 5. The external components, are

calculated for 2 different max boost/cut conditions

Graphic Equalizer

MSB

LSB

FUNCTION

1

D3D2

D1D0

S2

C1

C0

0

0

0

0

1

0

0

1

1

0

0

1

0

1

0

Band 1

Band 2

Band 3

Band 4

Band 5

D3

D3

D2

D2

D1

D1

1

0

C2

C2

C1

C1

C0

C0

cut

Boost

0

0

0

0

1

1

1

1

0

0

1

1

0

0

1

1

0

1

0

1

0

1

0

1

0dB

2dB

4dB

6dB

8dB

10dB

12dB

14dB

AX = 0.375dB steps, BX = 3dB steps, CX = 2dB steps, X = dont’care

STATUS AFTER POWER-ON RESET

Volume

-17.25dB

Graphic equalizer bands

-12dB

TABLE 1: Max Boost/cut = 20 dB (each cell =

±14dB)

F (HZ)

Q

R1 (K

Ω)R2 (KΩ)

C1 (nF)

C2 (nF)

Av max (dB)

BAND 1

10363.38

1.49

47

5.1

0.820

1.2

13.52

BAND 2

261.03

1.49

47

5.1

33

47

13.63

BAND 3

1036.34

1.49

47

5.1

8.2

12

13.52

BAND 4

3168.08

1.49

47

5.1

2.7

3.9

13.57

BAND 5

59.75

1.11

43

7.5

220

100

13.88

For THD performance the sequence Band 1, 2, 3, 4, 5, is recommended

TABLE2: Max Boost/cut = 17dB (each cell =

±12dB)

F (HZ)

Q

R1 (K

Ω)R2 (KΩ)

C1 (nF)

C2 (nF)

Av max (dB)

BAND 1

10158.00

1.15

33

6.2

1.2

1

11.83

BAND 2

250.81

1.21

30

5.1

47

56

11.33

BAND 3

977.34

1.20

39

6.8

10

10

11.75

BAND 4

3429.00

1.25

39

6.2

2.7

3.3

11.67

BAND 5

61.82

1.15

33

6.2

180

180

11.27

TDA7317

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