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AD1893,pdf datasheet (Sample R
消耗积分:3 |
格式:rar |
大小:550 |
2009-09-14
王艳
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The AD1893 has a pin selectable slow- or fast-settling mode.
This mode determines how quickly the ASRC adapts to a
change in either the input sample clock frequency (FSIN) or the
output sample clock frequency (FSOUT). In the slow-settling
mode, the control loop which computes the ratio between FSIN
and FSOUT settles in approximately 800 ms and begins to reject
jitter above 3 Hz. The slow-settling mode offers the best signal
quality and the greatest jitter rejection. In the fast-settling mode,
the control loop settles in approximately 200 ms and begins to
reject jitter above 12 Hz. The fast-settling mode allows rapid,
real time sample rate changes to be tracked without error, at the
expense of some narrowband noise modulation products on the
output signal.
This mode determines how quickly the ASRC adapts to a
change in either the input sample clock frequency (FSIN) or the
output sample clock frequency (FSOUT). In the slow-settling
mode, the control loop which computes the ratio between FSIN
and FSOUT settles in approximately 800 ms and begins to reject
jitter above 3 Hz. The slow-settling mode offers the best signal
quality and the greatest jitter rejection. In the fast-settling mode,
the control loop settles in approximately 200 ms and begins to
reject jitter above 12 Hz. The fast-settling mode allows rapid,
real time sample rate changes to be tracked without error, at the
expense of some narrowband noise modulation products on the
output signal.
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