−0.05

−0.04

−0.03

−0.02

−0.01

0.00

0.01

0.02

0.03

0.04

0.05

0.0

0.5

1.0

1.5

2.0

Frequency (x fS)

G028

−120

−100

−80

−60

−40

−20

0

0

1

2

3

4

Frequency (x fS)

G006

−0.4

−0.2

0.0

0.2

0.4

0.6

0.8

1.0

0

10

20

30

40

50

60

70

80

90

100

Samples

G017

PCM5100, PCM5101, PCM5102

SLAS764B – MAY 2011 – REVISED SEPTEMBER 2012

www.ti.com

Normal x2 / x1(bypass) Interpolation filter is programmed in 256 cycles in 1 sample time (tS) for sample rates

from 8kHz to 384kHz.

Table 11. Normal x2 Interpolation Filter

Parameter

Condition

Value (Typ)

Value (Max)

Units

Filter Gain Pass Band

0 ……. 0.45fS

±0.02

dB

Filter Gain Stop Band

0.55fS ….. 7.455fS

–60

dB

Filter Group Delay

22tS

s

Figure 22. Normal x2 Interpolation Filter Frequency

Figure 23. Normal x2 Interpolation Filter Impulse

Response

Response

Figure 24. Normal x2 Interpolation Filter Passband Ripple

18

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