WM8953ECSSLASHRV datasheet(97/100 Pages) WOLFSON

97 / 100 page

Production Data

WM8953

PD, January 2009, Rev 4.0

DIGITAL FILTER CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

ADC Filter

+/- 0.05dB

0.454 fs

Passband

-6dB

0.5fs

Passband Ripple

+/- 0.05

Stopband

0.546s

Stopband Attenuation

f > 0.546 fs

-60

Group Delay

18/fs

ADC FILTER RESPONSES

-140

-120

-100

-80

-60

-40

-20

0.00

0.25

0.50

0.75

Frequency (fs)

-0.1

-0.08

-0.06

-0.04

-0.02

0.02

0.04

0.06

0.08

0.1

0.00

0.25

Frequency (fs)

Figure 59 ADC Digital Filter Frequency Response

Figure 60 ADC Digital Filter Ripple

ADC HIGH PASS FILTER RESPONSES

MAGNITUDE(dB)

2.6923

7.2484

19.515

52.54

141.45

380.83

1.0253k

2.7605k

7.432k

20.009k

-11.736

-10.562

-9.3883

-8.2145

-7.0407

-5.8669

-4.6931

-3.5193

-2.3455

-1.1717

2.1246m

hpf_response.res MAGNITUDE(dB)

hpf_response2.res MAGNITUDE(dB)

hpf_response2.res#1 MAGNITUDE(dB)

5.0248

12.624

31.716

79.683

200.19

502.96

1.2636k

3.1747k

7.9761k

20.039k

-83.352

-75.017

-66.682

-58.347

-50.012

-41.677

-33.342

-25.007

-16.672

-8.3373

-2.3338m

Figure 61 ADC Digital High Pass Filter Frequency

Response (48kHz, Hi-Fi Mode, ADC_HPF_CUT[1:0]=00)

Figure 62 ADC Digital High Pass Filter Ripple (48kHz,

Voice Mode, ADC_HPF_CUT=01, 10 and 11)

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