WM8501GED(2006) データシートの表示（PDF） - Wolfson Microelectronics plc

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WM8501GED
(Rev.:2006)

24-bit 192kHz Stereo DAC with 1.7Vrms Line Driver

Wolfson Microelectronics plc 

WM8501

Pre-Production

1/fs

LRCLK

Max 4 BCLK's

BCLK

DIN

LEFT CHANNEL

RIGHT CHANNEL

12

MSB

15 16 1 2

LSB

Input Word Length (16 bits)

15 16

NO VALID DATA

1

Figure 6 DSP Mode B Timing

AUDIO DATA SAMPLING RATES

The master clock for WM8501 supports audio sampling rates from 128fs to 768fs, where fs is the

audio sampling frequency (LRCLK) typically 32kHz, 44.1kHz, 48kHz, 96kHz or 192kHz. The

master clock is used to operate the digital filters and the noise shaping circuits.

The WM8501 has a master clock detection circuit that automatically determines the relation

between the master clock frequency and the sampling rate (to within +/- 8 master clocks). If there

is a greater than 8 clocks error, the interface shuts down the DAC and mutes the output. The

master clock should be synchronised with LRCLK, although the WM8501 is tolerant of phase

differences or jitter on this clock.

SAMPLING

RATE

(LRCLK)

128fs

MASTER CLOCK FREQUENCY (MHz) (MCLK)

192fs

256fs

384fs

512fs

32kHz

4.096

6.144

8.192

12.288

16.384

44.1kHz

5.6448

8.467

11.2896

16.9344

22.5792

48kHz

6.144

9.216

12.288

18.432

24.576

96kHz

12.288

18.432

24.576

36.864 Unavailable

192kHz

24.576

36.864 Unavailable Unavailable Unavailable

Table 1 Master Clock Frequencies Versus Sampling Rate

768fs

24.576

33.8688

36.864

Unavailable

Unavailable

w

PP Rev 3.1 May 2006

12

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