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

D002

0

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

-0.5

-0.5

-0.4

-0.4

-0.3

-0.3

-0.2

-0.2

-0.1

-0.1

0

0

0.1

0.1

0.2

0.2

0.3

0.3

0.4

0.4

0.5

0.5

D002

Pass-Band Ripple

Phase Deviation

24

PCM1840

SBAS989 – APRIL 2019

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Table 17. Low-Latency Decimation Filter Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Pass-band ripple

–0.04

0.04

dB

Stop-band attenuation

88.3

dB

Group delay or latency

8.7

Group delay deviation

–0.026

0.026

Phase deviation

–0.26

0.31

Degrees

7.3.7.2.2.4

Sampling Rate: 48 kHz or 44.1 kHz

Figure 44 shows the magnitude response and Figure 45 shows the pass-band ripple and phase deviation for a

decimation filter with a sampling rate of 48 kHz or 44.1 kHz. Table 18 lists the specifications for a decimation

filter with a 48-kHz or 44.1-kHz sampling rate.

Figure 44. Low-Latency Decimation Filter Magnitude

Response

Figure 45. Low-Latency Decimation Filter Pass-Band

Ripple and Phase Deviation

Table 18. Low-Latency Decimation Filter Specifications

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Pass-band ripple

–0.015

0.015

dB

Stop-band attenuation

86.4

dB

Group delay or latency

7.7

Group delay deviation

–0.027

0.027

Phase deviation

–0.25

0.30

Degrees