WM8734 datasheet(39/46 Pages) WOLFSON

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WM8734

Production Data

PD Rev 4.1 November 2006

TERMINOLOGY

Stop Band Attenuation (dB) - the degree to which the frequency spectrum is attenuated (outside audio band)

Pass-band Ripple – any variation of the frequency response in the pass-band region

DAC FILTER RESPONSES

-100

-80

-60

-40

-20

0.5

1.5

2.5

Frequency (Fs)

-0.04

-0.03

-0.02

-0.01

0.01

0.02

0.03

0.04

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

Frequency (Fs)

Figure 25 DAC Digital Filter Frequency Response –Type 1

Figure 26 DAC Digital Filter Ripple –Type 1

-100

-80

-60

-40

-20

0.5

1.5

2.5

Frequency (Fs)

-0.06

-0.05

-0.04

-0.03

-0.02

-0.01

0.01

0.02

0.05

0.1

0.15

0.2

0.25

Frequency (Fs)

Figure 27 DAC Digital Filter Frequency Response –Type 2

Figure 28 DAC Digital Filter Ripple –Type 2

ADC FILTER RESPONSES

-100

-80

-60

-40

-20

0.5

1.5

2.5

Frequency (Fs)

-0.06

-0.05

-0.04

-0.03

-0.02

-0.01

0.01

0.02

0.05

0.1

0.15

0.2

0.25

0.3

0.35

0.4

0.45

0.5

Frequency (Fs)

Figure 29 ADC Digital Filter Frequency Response –Type 1

Figure 30 ADC Digital Filter Ripple –Type 1

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