Normalized Frequency (1/fS)

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

3.6

4

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

D001

Normalized Frequency (1/fS)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

D001

Normalized Frequency (1/fS)

0

0.4

0.8

1.2

1.6

2

2.4

2.8

3.2

3.6

4

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

D001

Normalized Frequency (1/fS)

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

-0.5

-0.4

-0.3

-0.2

-0.1

0

0.1

0.2

0.3

0.4

0.5

D001

21

PCM1840

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SBAS989 – APRIL 2019

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7.3.7.2.1.6

Sampling Rate: 96 kHz or 88.2 kHz

Figure 34 and Figure 35 respectively show the magnitude response and the pass-band ripple for a decimation

filter with a sampling rate of 96 kHz or 88.2 kHz. Table 13 lists the specifications for a decimation filter with an

96-kHz or 88.2-kHz sampling rate.

Figure 34. Linear Phase Decimation Filter Magnitude

Response

Figure 35. Linear Phase Decimation Filter Pass-Band

Ripple

Table 13. Linear Phase Decimation Filter Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Pass-band ripple

Frequency range is 0 to 0.454 × fS

–0.05

0.05

dB

Stop-band attenuation

Frequency range is 0.58 × fS to 4 × fS

73.6

dB

Frequency range is 4 × fS onwards

97.9

Group delay or latency

Frequency range is 0 to 0.454 × fS

17.1

1/fS

7.3.7.2.1.7

Sampling Rate: 192 kHz or 176.4 kHz

Figure 36 and Figure 37 respectively show the magnitude response and the pass-band ripple for a decimation

filter with a sampling rate of 192 kHz or 176.4 kHz. Table 14 lists the specifications for a decimation filter with an

192-kHz or 176.4-kHz sampling rate.

Figure 36. Linear Phase Decimation Filter Magnitude

Response

Figure 37. Linear Phase Decimation Filter Pass-Band

Ripple

Table 14. Linear Phase Decimation Filter Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Pass-band ripple

Frequency range is 0 to 0.3 × fS

–0.05

0.05

dB

Stop-band attenuation

Frequency range is 0.473 × fS to 4 × fS

70.0

dB

Frequency range is 4 × fS onwards

111.0

Group delay or latency

Frequency range is 0 to 0.3 × fS

11.9

1/fS