PCM1802

SLES023B – DECEMBER 2001 – REVISED MARCH 2002

6

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TYPICAL PERFORMANCE CURVES OF INTERNAL FILTER

digital filter—decimation filter frequency response

Figure 1. Overall Characteristics

Frequency [

× fS]

–200

–150

–100

–50

0

50

0

8

16

24

32

40

48

56

64

Oversampling Ratio = x128

AMPLITUDE

vs

FREQUENCY

Figure 2. Overall Characteristics

Frequency [

× fS]

–200

–150

–100

–50

0

50

0

8

16

24

32

AMPLITUDE

vs

FREQUENCY

Oversampling Ratio = x64

Figure 3. Stopband Attenuation Characteristics

Frequency [

× fS]

–100

–90

–80

–70

–60

–50

–40

–30

–20

–10

0

0.00

0.25

0.50

0.75

1.00

AMPLITUDE

vs

FREQUENCY

Oversampling

Ratio = x128 and x64

Figure 4. Passband Ripple Characteristics

Frequency [

× fS]

–1.0

–0.8

–0.6

–0.4

–0.2

–0.0

0.2

0.0

0.1

0.2

0.3

0.4

0.5

0.6

AMPLITUDE

vs

FREQUENCY

Oversampling

Ratio = x128 and x64

All specifications at TA = 25°C, VCC = 5 V, VDD = 3.3 V, master mode, fS = 44.1 kHz, system clock = 384 fS, oversampling ratio = ×128,

24-bit data, unless otherwise noted.