WM8956 datasheet(73/80 Pages) WOLFSON

Part #	WM8956

Description	Hi-Fi DAC with 1W Stereo Class D Speaker Drivers and Headphone Drivers

PDF	80 Pages

Scroll/Zoom	100%

Manufacturer	WOLFSON [Wolfson Microelectronics plc]

Direct Link	http://www.wolfsonmicro.com

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73 / 80 page

Preliminary Technical Data

WM8956

PTD, July 2007, Rev 2.1

DIGITAL FILTER CHARACTERISTICS

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

DAC Normal Filter

+/- 0.03dB

0.454 fs

Passband

-6dB

0.5 fs

Passband Ripple

0.454 fs

+/- 0.03

Stopband

0.546 fs

Stopband Attenuation

f > 0.546 fs

-50

DAC Sloping Stopband Filter

+/- 0.03dB

0.25 fs

+/- 1dB

0.25 fs

0.454 fs

Passband

-6dB

0.5 fs

Passband Ripple

0.25 fs

+/- 0.03

Stopband 1

0.546 fs

0.7 fs

Stopband 1 Attenuation

f > 0.546 fs

-60

Stopband 2

0.7 fs

1.4 fs

Stopband 2 Attenuation

f > 0.7 fs

-85

Stopband 3

1.4 fs

Stopband 3 Attenuation

f > 1.4 fs

-55

DAC FILTERS

Mode

Group Delay

Normal

18 / fs

Sloping Stopband

18 / fs

DAC FILTER RESPONSES

DAC STOPBAND ATTENUATION

The DAC digital filter type is selected by the DACSLOPE register bit as shown in Table 42.

ADDRESS

BIT

LABEL

DEFAULT

DESCRIPTION

R6 (06h)

DAC Control (2)

DACSLOPE

Selects DAC filter characteristics

0 = Normal mode

1 = Sloping stopband mode

Table 42 DAC Filter Selection

WM8956 Datasheet(PDF) 73 Page - Wolfson Microelectronics plc

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