AV2722 查看數據表（PDF） - Unspecified
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AV2722 Datasheet PDF : 29 Pages
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AV2722 (Preliminary)
XCK SYSTEN CLOCK REQUIREMENT
The system clock (XCK at pin 27) for the AV2722 supports audio sampling rates from 64fs to 384fs for regular type
audio, where fs is the audio sampling frequency (SFDA /SFAD), typically 8KHz, 44.1KHz, 48KHz, 96KHz, or
192KHz. For USB type audio, SFDA /SFAD is either 250fs or 272fs. XCK is used to operate the digital interpolation
filter and the delta-sigma modulator. By using the two-wire (I2S) or 3-wire (MPU type) serial command port, user
can program the chip to accept different clock frequency under different sampling rate.
Sampling Rate
ADC
DAC
48KHz
48KHz
48KHz
8KHz
8KHz
48KHz
8KHz
8KHz
44.1KHz
44.1KHz
44.1KHz
8KHz
8KHz
44.1KHz
8KHz
8KHz
88.2KHz
88.2Khz
96KHz
96KHz
OFF
192KHz
64fs
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
12.288
XCK Clock Frequency (MHz) For Regular Mode
96fs
128fs
192fs
256fs
N/A
N/A
N/A
12.288
N/A
N/A
N/A
12.288
N/A
N/A
N/A
12.288
N/A
N/A
N/A
12.288
N/A
N/A
N/A
11.289
N/A
N/A
N/A
11.289
N/A
N/A
N/A
11.289
N/A
N/A
N/A
11.289
N/A
11.289
16.934
N/A
N/A
12.288
18.432
N/A
18.432
24.576
36.864
49.152
384fs
18.432
18.432
18.432
18.432
16.934
16.934
16.934
16.934
N/A
N/A
73.728
Sampling Rate
ADC
DAC
48KHz
48KHz
48KHz
8KHz
8KHz
48KHz
8KHz
8KHz
96KHz
96KHz
44.1KHz
44.1KHz
44.1KHz
8KHz
44.1KHz
8KHz
8KHz
44.1KHz
8KHz
8KHz
88.2KHz
88.2KHz
XCK Clock Frequency (MHz) For USB Mode
250fs
272fs
12
N/A
12
N/A
12
N/A
12
N/A
12
N/A
N/A
12
N/A
12
N/A
12
N/A
12
N/A
12
N/A
12
5-29
January 22, 2004
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