CS5378 查看數據表（PDF） - Cirrus Logic

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CS5378

Low-power Single-channel Decimation Filter

Cirrus Logic 

CS5378

Filter Type

IIR1 (Coefficient set 0)

1st order, high pass

Corner at 0.15% fs

3 coefficients

IIR1 (Coefficient set 1)

1st order, high pass

Corner at 0.30% fs

3 coefficients

IIR1 (Coefficient set 2)

1st order, high pass

Corner at 0.60% fs

3 coefficients

IIR1 (Coefficient set 3)

1st order, high pass

Corner at 0.90% fs

3 coefficients

IIR1 (Coefficient set 4)

1st order, high pass

Corner at 1.20% fs

3 coefficients

System Function

H

(z)

=

⎜⎜⎝⎛

b10 + b11 z −1

1 + a11 z −1

⎟⎟⎠⎞

H

(z)

=

⎜⎜⎝⎛

b10 + b11 z −1

1 + a11 z −1

⎟⎟⎠⎞

H

(z)

=

⎜⎜⎝⎛

b10 + b11 z −1

1 + a11 z −1

⎟⎟⎠⎞

H

(z)

=

⎜⎜⎝⎛

b10 + b11 z −1

1 + a11 z −1

⎟⎟⎠⎞

H

(z)

=

⎜⎜⎝⎛

b10 + b11 z −1

1 + a11 z −1

⎟⎟⎠⎞

Filter Coefficients

(normalized 24-bit)

a11 = -8309916

b10 = 8349262

b11 = -8349262

a11 = -8231957

b10 = 8310282

b11 = -8310282

a11 = -8078179

b10 = 8233393

b11 = -8233393

a11 = -7927166

b10 = 8157887

b11 = -8157887

a11 = -7778820

b10 = 8083714

b11 = -8083714

Filter Type

IIR2 (Coefficient set 0)

2nd order, high pass

Corner at 0.15% fs

5 coefficients

IIR2 (Coefficient set 1)

2nd order, high pass

Corner at 0.30% fs

5 coefficients

IIR2 (Coefficient set 2)

2nd order, high pass

Corner at 0.60% fs

5 coefficients

IIR2 (Coefficient set 3)

2nd Order, high pass

Corner at 0.90% fs

5 coefficients

IIR2 (Coefficient set 4)

2nd order, high pass

Corner at 1.20% fs

5 coefficients

System Function

H

(z)

=

⎜⎜⎝⎛

b20 + b21 z −1 + b22 z −1

1 + a21 z −1 + a22 z −1

⎟⎟⎠⎞

Filter Coefficients

(normalized 24-bit)

a21 = -8332704

a22 = 4138771

b20 = 4166445

b21 = -8332890

b22 = 4166445

H

(z)

=

⎜⎜⎝⎛

b20 + b21 z −1 + b22 z −1

1 + a21 z −1 + a22 z −1

⎟⎟⎠⎞

a21 = -8276806

a22 = 4083972

b20 = 4138770

b21 = -8277540

b22 = 4138770

H

(z)

=

⎜⎜⎝⎛

b20 + b21 z −1 + b22 z −1

1 + a21 z −1 + a22 z −1

⎟⎟⎠⎞

a21 = -8165041

a22 = 3976543

b20 = 4083972

b21 = -8167944

b22 = 4083972

H

(z)

=

⎜⎜⎝⎛

b20 + b21 z −1 + b22 z −1

1 + a21 z −1 + a22 z −1

⎟⎟⎠⎞

a21 = -8053350

a22 = 3871939

b20 = 4029898

b21 = -8059796

b22 = 4029898

H

(z)

=

⎜⎜⎝⎛

b20 + b21 z −1 + b22 z −1

1 + a21 z −1 + a22 z −1

⎟⎟⎠⎞

a21 = -7941764

a22 = 3770088

b20 = 3976539

b21 = -7953078

b22 = 3976539

Table 17. IIR Filter Coefficients

DS639F2

55

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