PCM1822 datasheet(22/41 Pages) TI

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8.3.6.2.1.6 Sampling Rate: 96 kHz or 88.2 kHz

Figure 8-19 and Figure 8-20 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 8-13 lists the specifications for a decimation

filter with an 96-kHz or 88.2-kHz sampling rate.

Normalized Frequency (1/fS)

0.4

0.8

1.2

1.6

2.4

2.8

3.2

3.6

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

D001

Figure 8-19. Linear Phase Decimation Filter

Magnitude Response

Normalized Frequency (1/fS)

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

0.1

0.2

0.3

0.4

0.5

D001

Figure 8-20. Linear Phase Decimation Filter Pass-

Band Ripple

Table 8-13. 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

Stop-band attenuation

Frequency range is 0.58 × fS to 4 × fS

73.6

Frequency range is 4 × fS onwards

97.9

Group delay or latency

Frequency range is 0 to 0.454 × fS

17.1

1/fS

8.3.6.2.1.7 Sampling Rate: 192 kHz or 176.4 kHz

Figure 8-21 and Figure 8-22 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 8-14 lists the specifications for a decimation

filter with an 192-kHz or 176.4-kHz sampling rate.

Normalized Frequency (1/fS)

0.4

0.8

1.2

1.6

2.4

2.8

3.2

3.6

-110

-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

D001

Figure 8-21. Linear Phase Decimation Filter

Magnitude Response

Normalized Frequency (1/fS)

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

0.1

0.2

0.3

0.4

0.5

D001

Figure 8-22. Linear Phase Decimation Filter Pass-

Band Ripple

Table 8-14. 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

Stop-band attenuation

Frequency range is 0.473 × fS to 4 × fS

70.0

Frequency range is 4 × fS onwards

111.0

Group delay or latency

Frequency range is 0 to 0.3 × fS

11.9

1/fS

PCM1822

SBASAK0 – DECEMBER 2020 – REVISED MAY 2022

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